Hack The Sec-Leading Resource Of Linux Tutorial: Rhel7

How to Install DHCP on CentOs 7 / RHEL 7

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<u><span style="color: #990000;">Install DHCP on CentOs 7 / RHEL 7</span></u></h2>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">DHCP Stands for Dynamic Host Configurations Protocol that is used to dynamically assign IP Addresses to Clients, on every device attached on network requires an IP Address to communicate with other devices.</span></span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwM0cqK_On4Fw5aALAdxXbLEqFv3ITWtmXz-nC8IzpJJzL9oQ4S1qqWw8pllK843ZkpVy75fsrydsQw2TKDJuGjaK3xegwFAVnxedm33R5z2egWcmhW2DzqO-h31rqNGAUhhLGP2h3oOen/s1600/dhcp_server_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwM0cqK_On4Fw5aALAdxXbLEqFv3ITWtmXz-nC8IzpJJzL9oQ4S1qqWw8pllK843ZkpVy75fsrydsQw2TKDJuGjaK3xegwFAVnxedm33R5z2egWcmhW2DzqO-h31rqNGAUhhLGP2h3oOen/s1600/dhcp_server_www.hackthesec.co.in.png" /></a></div>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><br /></span></span></div>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">If you notice when you connect to a network and you get an IP address automatically that is given by <a href="http://www.hackthesec.co.in/search/label/DHCP-Server">DHCP Server</a>.</span></span></div>
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<b><u><span style="color: #0b5394;">Step – 1</span></u></b></div>
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Open the terminal window and install DHCP package using yum command.</div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: large;"><span style="line-height: 20.8px;">yum install dhcp -y</span></span></pre>
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<span style="color: #0b5394; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>Step - 2</u></b></span></span></div>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Edit the configuration file.</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: large;"><span style="line-height: 20.8px;">vi /etc/etc/dhcp/dhcpd.conf</span></span></pre>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Copy and paste below code into '<b>/etc/dhcp/dhcpd.conf</b>' file, and change according to your desired settings.</span></span></div>
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<pre style="background-color: whitesmoke; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-sizing: border-box; margin-bottom: 10px; overflow: auto; padding: 9.5px; word-break: break-all; word-wrap: break-word;"><span style="color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; line-height: 1.42857;"># DHCP Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd.conf.example
# see dhcpd.conf(5) man page
#
# Option definitions common to all supported networks
# Specify domain name
option domain-name “hackthesec.co.in”;
# Specify name server’s hostname or IP address
option domain-name-servers 192.168.1.1;
# Default lease time
default-lease-time 600;
# Max lease time
max-lease-time 7200;
# This DHCP server Authoritative server in the Network.
authoritative;
subnet 192.168.1.0 netmask 255.255.255.0 {# Specify the range of lease IP address
range dynamic-bootp 192.168.1.11 192.168.1.100;
# Specify broadcast address
option broadcast-address 192.168.1.255;
# Specify default gateway
option routers 192.168.1.1;
}</span><span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px; white-space: normal;">
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Now Save and Exit the file.</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: large;"><span style="line-height: 20.8px;">:wq</span></span></pre>
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<span style="color: #0b5394; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>Step - 3</u></b></span></span></div>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Now its time to Enable and start the DHCP Service.</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: large;"><span style="line-height: 20.8px;">systemctl enable dhcpd</span></span></pre>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: large;"><span style="line-height: 20.8px;">systemctl start dhcpd</span></span></pre>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">If you didn’t miss anything clients machines on your network now able to get automatic ip addresses from your DHCP server.</span></span></div>
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So, setup your client machine on "Obtain an IP Address Automatically" it should get an automatic ip addresses from the specified range in the <a href="http://www.hackthesec.co.in/search/label/DHCP">DHCP </a>server.</div>
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<a href="http://www.hackthesec.co.in/">www.hackthesec.co.in</a></div>
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How to Install DHCP on CentOs 7 / RHEL 7

Install DHCP on CentOs 7 / RHEL 7 DHCP Stands for Dynamic Host Configurations Protocol that is used to dynamically assign IP Addresses ...

How to install webmin on CentOS/Redhat 7

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<u><span style="color: #990000;">Install webmin on CentOS 7</span></u></h2>
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<span style="color: #222222; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><a href="http://www.hackthesec.co.in/search/label/webmin">Webmin</a> is a web-based interface for system administration for Unix. Using any modern web browser, you can setup user accounts, Apache, DNS, file sharing and much more. Webmin removes the need to manually edit Unix configuration files like /etc/passwd, and lets you manage a system from the console or remotely. See the s<a href="http://www.webmin.com/standard.html">tandard modules</a> page for a list of all the functions built into Webmin</span></span></div>
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<li style="font-family: Verdana, Geneva, sans-serif; line-height: 19.2px;"><span style="font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px; text-decoration: none;"><a href="http://www.hackthesec.co.in/2016/01/how-to-install-usermin-on-centos.html"><span style="font-size: large;">How to Install Usermin On Linux</span></a></span></li>
<li><span style="color: #333333; font-family: Verdana, Geneva, sans-serif; font-size: large;"><span style="line-height: 19.2px;"><a href="http://www.hackthesec.co.in/2016/01/how-to-install-webmin-on-centos-6.html">How to install webmin on centos 6</a></span></span></li>
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<span style="color: #222222; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>INSTALLATION STEPS:-</u></b></span></span></div>
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<span style="color: #0b5394; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>Step-1: </u></b></span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">mkdir /download
cd /download</span></span></pre>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u><span style="color: #0b5394;">Step-2:</span></u></b><span style="color: #222222;"> Download the rpm file from <a href="http://webmin.com/">webmin.com</a></span></span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">wget </span></span><span style="background-color: transparent; font-size: 15px; line-height: 15.6px;"><span style="color: white; font-family: trebuchet ms, sans-serif;">http://prdownloads.sourceforge.net/webadmin/webmin-1.791-1.src.rpm</span></span></pre>
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<span style="color: #222222; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Once you finish download make sure you have perl package installed, as webmin is a perl application it will check the package when initial installation process begin if it is there it will continue so let’s install perl packages first.</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">yum -y install perl perl-Net-SSLeay openssl perl-IO-Tty</span></span></pre>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u><span style="color: #0b5394;">Step-3:</span></u></b><span style="color: #222222;"> Now install webmin from '.rpm' file we downloaded.</span></span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">rpm -ivUh </span></span><span style="background-color: transparent; color: white; font-family: 'trebuchet ms', sans-serif; font-size: 15px; line-height: 15.6px;">webmin-1.791-1.src.rpm</span></pre>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>Method-2: How to Install webmin using Yum Command.</u></b></span></span></div>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Another way to install webmin on your <a href="http://www.hackthesec.co.in/search/label/Centos">CentOS</a> 7 Box using Yum Command, since webmin is not in CentOS default Repositories, we have to create webmin repository before installation.</span></span></div>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u><span style="color: #0b5394;">Step-1:</span></u></b> Frist step is to create the repository file.</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">vi /etc/yum.repos.d/webmin.repo</span></span></pre>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Copy and paste the below code into the file.</span></span></div>
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<pre style="background-color: whitesmoke; border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-sizing: border-box; color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; line-height: 1.42857; margin-bottom: 10px; overflow: auto; padding: 9.5px; word-break: break-all; word-wrap: break-word;">[Webmin]
name=Webmin Distribution Neutral
#baseurl=http://download.webmin.com/download/yum
mirrorlist=http://download.webmin.com/download/yum/mirrorlist
enabled=1</pre>
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<span style="color: #222222; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Save and exit.</span></span></div>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u><span style="color: #0b5394;">Step-2:</span></u></b><span style="color: #222222;"> Now download the GPG key using the below command.</span></span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">wget http://www.webmin.com/jcameron-key.asc</span></span></pre>
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<span style="color: #222222; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Import the GPG Key</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">rpm –import jcameron-key.asc</span></span></pre>
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<span style="font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u><span style="color: #0b5394;">Step-3:</span></u></b><span style="color: #222222;"> Finally you can install the webmin using Yum command.</span></span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: trebuchet ms, sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">yum install webmin –y</span></span></pre>
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<span style="color: #222222; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Now open <b>http://serverip:10000</b> in your browser, you could see the below screen after login ( Use root username and password ).</span></span></div>
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<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEizudnF5XbG8-xiAO9rt-OQYS8oQCQJ5B_SIsx-apcSksTewahdIeRULIOfuoTY_rpiFC5n8H6xhg8jBjJyCLfy9oUgXgiH9x9snAl7gxB3bNUZaolkfRvNKnXlcWXBgFzkkgCErVgBUnMF/s640/webmin_configuration_www.hackthesec.co.in.png" /></div>
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<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhea7QjVvwiIdl_-oS5mhbo60n5KhIh5XtfFDlOv0Fz8znuzoJId6qafnlIwv5WfrDPSs9kJkd4z3ISzNfX_mCtXsbXznnRjXeUS8Ntya4dQdOo6ZyYHTMZ5c67Y_SfvSB2tAXt8557eVTd/s640/webmin_useradmin_www.hackthesec.co.in.png" /></div>
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<span style="color: #222222; font-family: verdana, geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><br /></span></span></div>
<div>
<a href="http://www.hackthesec.co.in/">www.hackthesec.co.in</a></div>
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How to install webmin on CentOS/Redhat 7

Install webmin on CentOS 7 Webmin is a web-based interface for system administration for Unix. Using any modern web browser, you can se...

How to set gurb2 password in RHEL7/Centos7

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<span style="color: #990000; font-size: large;"><u>Set Gurb2 Password In Linux</u></span></h1>
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How to reset the root password but its security vulnerable to Linux.Anyone who have physical access to system can easily reset the root password. So we can avoid it by using the setting up of the grub password.</div>
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To set the grub password we set <b>superuser</b> name and password in grub configuration file.</div>
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For this we have to modify the <strong style="box-sizing: border-box;">grub2.conf</strong> file in <strong style="box-sizing: border-box;">/etc/</strong> directory</div>
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<span style="color: #222222;">firstly we have to create a password by using </span><span style="box-sizing: border-box;"><b style="box-sizing: border-box;"><span style="color: red;">grub2-mkpasswd-pbkdf2</span></b></span><b style="box-sizing: border-box; color: #222222;"> </b><span style="color: #222222;">command copy the password and enter password twice as follows</span></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: #333333; font-family: 'Trebuchet MS', sans-serif; line-height: 19.2px;"><span style="line-height: 19.2px;"><span style="color: white; line-height: 15.6px;">[root@hackthesec]# </span></span></span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-family: Trebuchet MS, sans-serif;">grub2-mkpasswd-pbkdf2</span></span></span></pre>
<pre class="xtypo_info" style="background: url("assets/shadow.png") 50% 100% repeat-x rgb(245, 245, 245); border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-shadow: rgb(204, 204, 204) 0px 0px 3px; box-sizing: border-box; color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; font-stretch: normal; line-height: 1.42857; margin-bottom: 10px; overflow: auto; padding: 9.5px; tab-size: 4; text-shadow: rgb(255, 255, 255) 0px 1px 0px; white-space: pre-wrap; word-break: break-all; word-wrap: break-word;">Enter password:

Reenter password:

PBKDF2 hash of your password is: grub.pbkdf2.sha512.10000.19074739ED80F115963D984BDCB35AA671C24325755377C3E9B014D862DA6ACC77BC110EED41822800A87FD3700C037320E51E9326188D53247EC0722DDF15FC.C56EC0738911AD86CEA55546139FEBC366A393DF9785A8F44D3E51BF09DB980BAFEF85281CBBC56778D8B19DC94833EA8342F7D73E3A1AA30B205091F1015A85</pre>
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<span style="color: #222222;">Then open </span><span style="box-sizing: border-box;"><b style="box-sizing: border-box;">/etc/grub2.conf</b></span><span style="color: #222222;"> file and locate </span><span style="box-sizing: border-box;"><b style="box-sizing: border-box;">### BEGIN /etc/grub.d/10_linux ###</b></span></div>
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section type the code as follows here I used the username is <strong style="box-sizing: border-box;">root</strong> that is our choice</div>
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<span style="box-sizing: border-box;"><b style="box-sizing: border-box;">set superusers "root"</b></span><b style="box-sizing: border-box;">export superusers</b></div>
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<b style="box-sizing: border-box;"></b></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: Trebuchet MS, sans-serif; font-size: large;"><span style="line-height: 15.6px;">password_ pbkdf2 root</span></span></pre>
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<span style="font-size: large;"><b style="box-sizing: border-box;"></b></span></div>
<pre class="xtypo_info" style="background: url("assets/shadow.png") 50% 100% repeat-x rgb(245, 245, 245); border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-shadow: rgb(204, 204, 204) 0px 0px 3px; box-sizing: border-box; color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; font-stretch: normal; line-height: 1.42857; margin-bottom: 10px; overflow: auto; padding: 9.5px; tab-size: 4; text-shadow: rgb(255, 255, 255) 0px 1px 0px; white-space: pre-wrap; word-break: break-all; word-wrap: break-word;">grub.pbkdf2.sha512.10000.19074739ED80F115963D984BDCB35AA671C24325755377C3E9B014D862DA6ACC77BC110EED41822800A87FD3700C037320E51E9326188D53247EC0722DDF15FC.C56EC0738911AD86CEA55546139FEBC366A393DF9785A8F44D3E51BF09DB980BAFEF85281CBBC56778D8B19DC94833EA8342F7D73E3A1AA30B205091F1015A85</pre>
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<b style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222;">T</strong><strong style="box-sizing: border-box; color: #222222;">hat’s It, Now You can reboot and </strong><strong style="box-sizing: border-box; color: #222222;"><b style="box-sizing: border-box;">Press "e" on Grub Menu</b></strong><strong style="box-sizing: border-box; color: #222222;">, It will ask you for the password.</strong></b></div>
</div>
</div>

How to set gurb2 password in RHEL7/Centos7

Set Gurb2 Password In Linux How to reset the root password but its security vulnerable to Linux.Anyone who have physical access to syst...

Apache HTTP Secure Server Configuration for CentOS 7

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<span style="font-size: x-large;"><u>Apache HTTP Secure Server Configuration</u></span></h1>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggHeyVUmoNeKIkBBwjp6w9tE0OlnEU9f5FNLy8noHKQ_s_cTyi8PsSLWCjaXbwr5gRYARjr8QQcccb5nDTV_-shq7uTRIrCVhm0AGvXtczAiAoj0T49-tGF57qEVLm9IsoxVlXU5R3YBJl/s1600/SSL.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggHeyVUmoNeKIkBBwjp6w9tE0OlnEU9f5FNLy8noHKQ_s_cTyi8PsSLWCjaXbwr5gRYARjr8QQcccb5nDTV_-shq7uTRIrCVhm0AGvXtczAiAoj0T49-tGF57qEVLm9IsoxVlXU5R3YBJl/s1600/SSL.png" /></a></div>
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<span style="font-size: x-large;"><u><br /></u></span></div>
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Securing the <a href="http://www.hackthesec.co.in/search/label/Apache" target="_blank">Apache</a> server is one of the most important tasks of the webmaster. In this example, we will show you in this Apache HTTP Secure Server Configuration tutorial  how to use <a href="http://www.hackthesec.co.in/search/label/SSL%20Encryption" target="_blank">ssl keys</a> with your Apache web server on your installed <a href="http://www.hackthesec.co.in/search/label/centos7" target="_blank">Centos7 </a>system. this method should also work on all Fedora or Redhat based  systems</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJzRTWvnXAQ0ZRfHxBuYgWRSlZYVURR8-Q7QJe6NnTmJyzbQWAV_0Tz7FYQ5QLj0-iETPuFhujh1IjAqm609EMcAXvGis8ycbsk-11Kv-Ed6tIbmZov1RSsRjtQWEgr1OSLnBJHKYJmiAv/s1600/system_checking_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJzRTWvnXAQ0ZRfHxBuYgWRSlZYVURR8-Q7QJe6NnTmJyzbQWAV_0Tz7FYQ5QLj0-iETPuFhujh1IjAqm609EMcAXvGis8ycbsk-11Kv-Ed6tIbmZov1RSsRjtQWEgr1OSLnBJHKYJmiAv/s1600/system_checking_www.hackthesec.co.in.png" /></a></div>
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<strong style="box-sizing: border-box;"><span style="color: #0b5394; font-size: large;"><u><br />Create Certificates</u></span></strong></div>
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<strong style="box-sizing: border-box;"><span style="color: #222222; font-size: 15px; font-weight: normal;">Change to the following directory:</span></strong></div>
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<strong style="box-sizing: border-box;"></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-family: "courier new" , "courier" , monospace;">[root@server /]#</span></span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;"> cd /etc/pki/tls/certs</span></span></span></pre>
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<strong style="box-sizing: border-box;"><span style="color: #222222; font-size: 15px; font-weight: normal;">Run the following command to make server key file:</span></strong></div>
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<strong style="box-sizing: border-box;"></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-family: "courier new" , "courier" , monospace;">[root@server certs]#</span></span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;"> make server.key</span></span></span></pre>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOd36DQttWjBm_ZM0hG34p4qGUhern7Q7wsDOxzymyXT9YAfXqnwWVlMVeqfhNR0WtxvouwiRdau8tqo_2MKQXp7WNmnbeTptl5R4d46yOOlgPznU2FN_0pywuA1ymTOw0pAdXZqMkpvsY/s1600/creating_server_key_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOd36DQttWjBm_ZM0hG34p4qGUhern7Q7wsDOxzymyXT9YAfXqnwWVlMVeqfhNR0WtxvouwiRdau8tqo_2MKQXp7WNmnbeTptl5R4d46yOOlgPznU2FN_0pywuA1ymTOw0pAdXZqMkpvsY/s1600/creating_server_key_www.hackthesec.co.in.png" /></a></div>
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<span style="color: #222222; font-size: 15px;">Remove passphrase from private key:</span></div>
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<strong style="box-sizing: border-box;"></strong></div>
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<strong style="box-sizing: border-box;"><u><span style="color: #0b5394;">Writing RSA key</span></u></strong></div>
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<span style="box-sizing: border-box;"></span><br />
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="box-sizing: border-box;"><span style="font-size: large;"><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-family: "courier new" , "courier" , monospace;">[root@server certs]#</span></span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px; white-space: pre;"> openssl rsa -in server.key -out server.key
Enter pass phrase for server.key:
writing RSA key</span></span></span></pre>
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</span></div>
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<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; font-size: 15px;"><span style="color: #0b5394;"><u>Generate CSR key file</u></span></strong></strong></div>
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<strong style="box-sizing: border-box;"><span style="color: #0b5394;"><u><strong style="box-sizing: border-box; font-size: 15px;"></strong></u></span></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-family: "courier new" , "courier" , monospace;">[root@server certs]#</span></span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;"> </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-family: "courier new" , "courier" , monospace;">make server.csr</span></span></span></pre>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEir6BCHFyKHm4fOYHQpAhoFzlt15I4yI9e59EcSQr0HggCzuu1QcqNPmjcr7qrqj_CorIvFKXuMOaSZ0NH8bZQUmJsfkSNoX5JvUjS4pnYsIvt07kLkBBgRLY8t7Gf8CAws7uxAi605iokU/s1600/generate_csr_file_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEir6BCHFyKHm4fOYHQpAhoFzlt15I4yI9e59EcSQr0HggCzuu1QcqNPmjcr7qrqj_CorIvFKXuMOaSZ0NH8bZQUmJsfkSNoX5JvUjS4pnYsIvt07kLkBBgRLY8t7Gf8CAws7uxAi605iokU/s1600/generate_csr_file_www.hackthesec.co.in.png" /></a></div>
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<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; font-size: 15px;"><strong style="box-sizing: border-box;"><u><span style="color: #0b5394;">Sign the key and make Expiration days:</span></u></strong></strong></strong></div>
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<strong style="box-sizing: border-box;"><u><span style="color: #0b5394;"><strong style="box-sizing: border-box; font-size: 15px;"></strong></span></u></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "courier new" , "courier" , monospace; font-size: large;"><span style="line-height: 15.6px;">[root@server certs]# openssl x509 -in server.csr -out server.crt -req -signkey server.key -days 1000
Signature ok
subject=/C=US/ST=AL/L=OLI/O=Hackthesec/OU=Hackthesec Tutorial/CN=server.hackthesec.co.in/emailAddress=info@hackthesec.co.in
Getting Private key
[root@server certs]#</span></span>
</pre>
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<strong style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; font-size: 15px; line-height: 26px;"><u><span style="color: #0b5394;">Configure SSL keys with Apache </span></u></strong><br />
<strong style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; font-size: 15px; line-height: 26px;"></strong><br />
<div style="-webkit-text-stroke-width: 0px; color: black; font-family: 'Times New Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px;">
</div>
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<pre style="-webkit-text-stroke-width: 0px; background-attachment: scroll; background-color: #3c3c3c; background-image: none; background-position: 0px 0px; background-repeat: repeat; border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: black; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; margin: 0px 0px 20px; orphans: auto; outline: 0px; overflow: auto; padding: 20px; text-align: left; text-indent: 0px; text-transform: none; vertical-align: baseline; widows: 1; word-spacing: 0px;"><span style="color: white; font-family: "courier new" , "courier" , monospace; font-size: large;"><span style="line-height: 15.6px;">[root@server certs]# yum -y install httpd mod_ssl</span></span>
</pre>
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<span style="background-color: white; box-sizing: border-box; line-height: 15.6px; white-space: pre;">
</span></div>
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<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; font-size: 15px;"><strong style="box-sizing: border-box;"><u><span style="color: #0b5394;">Enable  en Start  apache</span></u></strong></strong></strong></div>
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<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; font-size: 15px;"><strong style="box-sizing: border-box;"></strong></strong></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "courier new" , "courier" , monospace; font-size: large;"><span style="line-height: 15.6px;">[root@server certs]# systemctl start httpd.service
[root@server certs]# systemctl enable httpd.service</span></span></pre>
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<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"><strong style="box-sizing: border-box;"><br /></strong></strong></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; font-size: 15px;"><strong style="box-sizing: border-box;"><span style="color: #0b5394;">Configure  ‘/etc/httpd/conf.d/ssl.conf’</span></strong></strong></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"><span style="font-weight: normal;">Your ssl.conf should be like this:</span></strong></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"></strong></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;">mv /etc/httpd/conf.d/ssl.conf  /etc/httpd/conf.d/ssl.conf.orig

</span></span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;">vi /etc/httpd/conf.d/ssl.conf</span></span></span></pre>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="font-size: 15px; line-height: 15.6px;">[root@server certs]# vi /etc/httpd/conf.d/ssl.conf
SSLPassPhraseDialog builtin
SSLSessionCache shmcb:/var/cache/mod_ssl/scache(512000)
SSLSessionCacheTimeout 300
SSLRandomSeed startup file:/dev/urandom 256
SSLRandomSeed connect builtin
SSLCryptoDevice builtin
<VirtualHost *:443>
DocumentRoot "/var/www/html"
ServerName 127.0.0.1:443
ErrorLog logs/ssl_error_log
TransferLog logs/ssl_access_log
LogLevel warn
SSLEngine on
SSLProtocol all -SSLv2
SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW
SSLCertificateFile /etc/pki/tls/certs/server.crt
SSLCertificateKeyFile /etc/pki/tls/certs/server.key
<Files ~ "\.(cgi|shtml|phtml|php3?)$">
SSLOptions +StdEnvVars
</Files>
<Directory "/var/www/cgi-bin">
SSLOptions +StdEnvVars
</Directory>
SetEnvIf User-Agent ".*MSIE.*" \
nokeepalive ssl-unclean-shutdown \
downgrade-1.0 force-response-1.0
CustomLog logs/ssl_request_log \
"%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b"
</VirtualHost>
</span></span></pre>
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<span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="font-size: 15px; line-height: 15.6px;"><br /></span></span></div>
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Save  and exit</div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; font-size: 15px; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><span style="color: #0b5394;">Restart Apache  </span></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><span style="color: #0b5394;"><strong style="box-sizing: border-box; font-size: 15px;"></strong></span></strong></div>
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Check if  the ports 80 and  443 are listening:</div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;"> </span></span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">netstat -tulpen | grep :80</span></span></pre>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="font-size: 15px; line-height: 15.6px;">
</span><span style="line-height: 15.6px;"><span style="font-size: large;"> </span></span></span><span style="font-size: large;"><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">netstat -tulpen | grep :443</span></span></pre>
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<span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="font-size: 15px; line-height: 15.6px;"><br /></span></span></div>
<div class="separator" style="clear: both; text-align: center;">
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<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"><span style="font-weight: normal;"><br />Allow the ports 80 and 443 via Iptables:</span></strong></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"></strong></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;">vi /etc/sysconfig/iptables
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT</span></span></span></pre>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"><span style="font-weight: normal;">If you are using  Firewalld  please  do :</span></strong></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"></strong></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;">firewall-cmd --permanent --add-port=80/tcp
</span></span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;">firewall-cmd --permanent --add-port=443/tcp</span></span></span></pre>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"><span style="font-weight: normal;">And restart or reload the firewalls :</span></strong></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"></strong></strong></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;">service iptables restart
Or 
</span></span><span style="color: white; font-family: "courier new" , "courier" , monospace; line-height: 15.6px;">[root@server certs]# </span></span><span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="line-height: 15.6px;"><span style="font-size: large;">firewall-cmd --reload</span></span><span style="font-size: 15px; line-height: 15.6px;">
</span></span></pre>
<div>
<span style="color: white; font-family: "courier new" , "courier" , monospace;"><span style="font-size: 15px; line-height: 15.6px;"><br /></span></span></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"><span style="font-weight: normal;">Open the browser and Check  </span><strong style="box-sizing: border-box;">https://server.hackthesec.co.in</strong></strong></strong></div>
<div class="separator" style="clear: both; text-align: center;">
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<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><strong style="box-sizing: border-box; color: #222222; font-size: 15px;"><strong style="box-sizing: border-box;"><br />Certificate View</strong></strong></strong></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgjNEUc61mVEi0DtyqECjspIrvaNH23vzqWFMKthHhfuyOO7knJG4UqjOmPOMIkkXK85SZra-QDAjGFpyMyPuO_idvu2ycfy3mUfxhuBCFnjfXV1CZyo_QVMWIffVm28PWAzBRONgLu9lV5/s1600/certificate_view_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgjNEUc61mVEi0DtyqECjspIrvaNH23vzqWFMKthHhfuyOO7knJG4UqjOmPOMIkkXK85SZra-QDAjGFpyMyPuO_idvu2ycfy3mUfxhuBCFnjfXV1CZyo_QVMWIffVm28PWAzBRONgLu9lV5/s1600/certificate_view_www.hackthesec.co.in.png" /></a></div>
<div style="background-color: white; box-sizing: border-box; font-family: Verdana, Geneva, sans-serif; line-height: 26px; margin-bottom: 26px; text-align: center;">
<a href="http://www.hackthesec.co.in/">www.hackthesec.co.in</a></div>
</div>
</div>

Apache HTTP Secure Server Configuration for CentOS 7

Apache HTTP Secure Server Configuration Securing the Apache server is one of the most important tasks of the webmaster. In this ex...

How to change MAC Address in CentOS 7

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<h1 class="entry-title" style="background-color: white; border: 0px; clear: none; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 1.7em; line-height: 1.2em; margin: 0px 0px 10px; outline: 0px; padding: 0px; vertical-align: baseline;">
<u><span style="color: red;">Change MAC Address in CentOS 7 </span></u></h1>
<div>
<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">This tutorial will show you how to change MAC Address in <a href="http://www.hackthesec.co.in/search/label/centos7" target="_blank">CentOS 7</a>. I assure you this is a perfectly working and tested method. In many cases you need to change MAC to allow internet access or run any MAC based licensed software like Radius Manager. So for those situations here we go.</span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIuvC6kadT6BMYCBW7d-OlEKcUH4NKD4A39VjAQLOehs9bsGzGJb5gNEBNrSUwChPxSGH8g0gkOGv2E3cSyw38NkW06GBPhl7gwhAIzQ3bZQSaYuWPaN-Q6srUbn34t4fWnoSjnJY6H3U-/s1600/vlcsnap-mac-id-changer-www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIuvC6kadT6BMYCBW7d-OlEKcUH4NKD4A39VjAQLOehs9bsGzGJb5gNEBNrSUwChPxSGH8g0gkOGv2E3cSyw38NkW06GBPhl7gwhAIzQ3bZQSaYuWPaN-Q6srUbn34t4fWnoSjnJY6H3U-/s1600/vlcsnap-mac-id-changer-www.hackthesec.co.in.jpg" /></a></div>
<div>
<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;"><br /></span></div>
<div>
<h3 style="background-color: white; border: 0px; clear: none; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; line-height: 1.2em; margin: 0px 0px 10px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-size: large;"><u>Steps to change MAC Address in CentOS 7:</u></span></h3>
<h3 style="background-color: white; border: 0px; clear: none; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 1.2em; line-height: 1.2em; margin: 0px 0px 10px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: inherit; font-size: 17.1px; font-style: inherit; font-weight: normal; line-height: 25.65px;">Update CentOS Repositories by:</span></h3>
<ol style="background-color: white; border: 0px; clear: left; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px; margin: 0px 0px 1.5em 3em; outline: 0px; padding: 0px; vertical-align: baseline;">
<li style="border: 0px; font-family: inherit; font-size: 17.1px; font-style: inherit; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;"><pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); font-size: 12px; line-height: 19.2px; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-family: 'Courier New', Courier, monospace; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: lime;">yum install update
</span></span></span></pre>
</li>
</ol>
<div>
<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">Install nano (for editing config files) and net-tools (for enabling ifconfig command).</span></div>
<div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: lime; font-family: Courier New, Courier, monospace; font-size: medium;"><span style="line-height: 15.6px;">yum install nano net-tools
</span></span></pre>
<div>
<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">Go to the ethernet configuration file.</span></div>
<div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: lime; font-family: Courier New, Courier, monospace; font-size: medium;"><span style="line-height: 15.6px;">nano /etc/sysconfig/network-scripts/ifcfg-ens160
</span></span></pre>
</div>
<div>
<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">Add the following line. Replace the current MAC with your desired MAC Address.</span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: lime; font-family: Courier New, Courier, monospace; font-size: medium;"><span style="line-height: 15.6px;">MACADDR=00:0C:29:24:79:76
</span></span></pre>
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<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">Save the configuration file</span></div>
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<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">Restart the networking process.</span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: lime; font-family: Courier New, Courier, monospace; font-size: medium;"><span style="line-height: 15.6px;">service network restart
</span></span></pre>
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<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">You are done. Now, verify by issuing ifconfig command</span></div>
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<span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">If you have a windows machine in the same network. Issue </span><strong style="background-color: white; border: 0px; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">arp -d</strong><span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;"> to delete current ARP table. Then ping CentOS 7 IP Address from Windows PC. Next issue </span><strong style="background-color: white; border: 0px; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">arp -a</strong><span style="background-color: white; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px;">. You will find the changed MAC next to your CentOS 7 IP Address.</span></div>
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<a href="http://www.hackthesec.co.in/">www.hackthesec.co.in</a></div>
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<div style="background-color: white; border: 0px; color: #333333; font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif; font-size: 17.1px; line-height: 25.65px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">
<div class="syntaxhighlighter nogutter notranslate bash" id="highlighter_90669" style="border: 0px; font-family: inherit; font-size: 1em !important; font-style: inherit; font-weight: inherit; margin: 1em 0px !important; outline: 0px; overflow: auto !important; padding: 0px; position: relative !important; vertical-align: baseline; width: 561.703px;">
<div class="toolbar" style="background: rgb(108, 226, 108) !important; border-radius: 0px !important; border: none !important; bottom: auto !important; box-sizing: content-box !important; color: white !important; float: none !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; font-size: 10px !important; height: 11px !important; left: auto !important; line-height: 1.1em !important; margin: 0px !important; min-height: auto !important; outline: 0px !important; overflow: visible !important; padding: 0px !important; position: absolute !important; right: 1px !important; top: 1px !important; vertical-align: baseline !important; width: 11px !important; z-index: 10 !important;">
<span style="border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;"></span></div>
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<div class="syntaxhighlighter nogutter notranslate bash" id="highlighter_604332" style="border: 0px; font-family: inherit; font-size: 1em !important; font-style: inherit; font-weight: inherit; margin: 1em 0px !important; outline: 0px; overflow: auto !important; padding: 0px; position: relative !important; vertical-align: baseline; width: 561.703px;">
<div class="toolbar" style="background: rgb(108, 226, 108) !important; border-radius: 0px !important; border: none !important; bottom: auto !important; box-sizing: content-box !important; color: white !important; float: none !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; font-size: 10px !important; height: 11px !important; left: auto !important; line-height: 1.1em !important; margin: 0px !important; min-height: auto !important; outline: 0px !important; overflow: visible !important; padding: 0px !important; position: absolute !important; right: 1px !important; top: 1px !important; vertical-align: baseline !important; width: 11px !important; z-index: 10 !important;">
<span style="border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;"></span></div>
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How to change MAC Address in CentOS 7

Change MAC Address in CentOS 7 This tutorial will show you how to change MAC Address in CentOS 7 . I assure you this is a perfectly wor...

How Install VLC Media Player in RHEL/CentOS 7/6 and Fedora 23-20

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<h1 class="post-title" style="background-color: white; border: 0px; font-family: 'Roboto Condensed', Arial, sans-serif; font-stretch: inherit; font-weight: 400; letter-spacing: -1px; line-height: 1.3em; margin: 0px 0px 10px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="color: red; font-size: large;">VLC Media Player in <a href="http://www.hackthesec.co.in/search/label/RHEL" target="_blank">RHEL</a>/<a href="http://www.hackthesec.co.in/search/label/Centos" target="_blank">CentOS</a>/<a href="http://www.hackthesec.co.in/search/label/Fedora" target="_blank">Fedora</a></span></h1>
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<span style="font-family: "georgia" , "times new roman" , serif; font-size: large;">VLC media player (commonly known as VLC) is a portable, free and open-source, cross-platform media player and streaming media server written by the VideoLAN project. VLC is available for desktop operating systems as also mobile platforms as Android, iPad, iPhone, and iPod Touch. VLC is also available on App stores such as Apple's App Store.</span><br />
<span style="font-family: "georgia" , "times new roman" , serif; font-size: large;"><br /></span>
<span style="font-family: "georgia" , "times new roman" , serif; font-size: large;">VLC media player supports many audio and video compression methods and file formats, including DVD-Video, video CD and streaming protocols. It is able to stream media over computer networks and to transcode multimedia files.</span><br />
<span style="font-family: "georgia" , "times new roman" , serif; font-size: large;"><b><br /></b></span>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgb8Av8IZjWc-x6PCG6WWJQ4_qdrx34elAz0cFHSlT7LNSB07OE8WnPDJVwX01zVlMC3YdV2KXyOLd2aa0ewPq3lvwNZuWDCYYXikfhhcB2vVToz6EiTG8xwA5gbxtA5VU3viexiR4xUWd8/s1600/VLC-logo-www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgb8Av8IZjWc-x6PCG6WWJQ4_qdrx34elAz0cFHSlT7LNSB07OE8WnPDJVwX01zVlMC3YdV2KXyOLd2aa0ewPq3lvwNZuWDCYYXikfhhcB2vVToz6EiTG8xwA5gbxtA5VU3viexiR4xUWd8/s1600/VLC-logo-www.hackthesec.co.in.png" /></a></div>
<span style="font-family: "georgia" , "times new roman" , serif; font-size: large;">The default distribution of VLC includes a large number of free decoding and encoding libraries, avoiding the need for finding/calibrating proprietary plugins. The libavcodec library from the FFmpeg project provides many of VLC's codecs, but the player mainly uses its own muxers, and demuxers. It also has its own protocol implementations. It also gained distinction as the first player to support playback of encrypted DVDs on Linux and OS X by using the libdvdcss DVD decryption library</span></div>
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<span style="font-family: "georgia" , "times new roman" , serif; font-size: large;"><br /></span></div>
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<span style="color: #0b5394; font-family: "georgia" , "times new roman" , serif; font-size: large;"><b><u>Install EPEL and Nux Dextop Repositories on RHEL/CentOS</u></b></span></div>
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<span style="color: #0b5394; font-family: "georgia" , "times new roman" , serif;"><b><u><br /></u></b></span></div>
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<span style="font-family: "georgia" , "times new roman" , serif;"><span style="background-color: white; font-size: 18px; line-height: 28.8px;">Install </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">Epel</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> and </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">Nux Dextop</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> repository for your </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">Linux OS</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> distribution using following links. </span></span></div>
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<span style="background-color: white; line-height: 28.8px;"><span style="color: #0b5394; font-family: "georgia" , "times new roman" , serif; font-size: large;"><u>For RHEL/CentOS 7</u></span></span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 16.9px;"><span style="color: lime; font-size: large;"># rpm -Uvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
</span><span style="color: white; font-size: large;"># rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm</span></span></pre>
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<span style="background-color: transparent; line-height: 15.6px;"><span style="color: #0b5394; font-size: large;"><b><u>For RHEL/CentOS 6</u></b></span></span></div>
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<span style="background-color: transparent; line-height: 15.6px;"><span style="color: #0b5394; font-size: large;"><b><u><br /></u></b></span></span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 16.9px;"><span style="font-size: large;"><span style="color: orange;">------------------ On 32-Bit Systems ------------------
</span><span style="color: lime;"># rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
</span></span><span style="color: white;"><span style="font-size: large;"># rpm -Uvh http://li.nux.ro/download/nux/dextop/el6/i386/nux-dextop-release-0-3.el6.nux.noarch.rpm
</span>
</span><span style="font-size: large;"><span style="color: orange;">------------------ On 64-Bit Systems ------------------</span><span style="color: white;">
# </span><span style="color: lime;">rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm</span><span style="color: white;">

# rpm -Uvh http://li.nux.ro/download/nux/dextop/el6/x86_64/nux-dextop-release-0-2.el6.nux.noarch.rpm</span></span></span></pre>
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<span style="background-color: transparent; line-height: 15.6px;"><span style="color: #0b5394; font-size: large;"><b><u>Installing RPMFusion Repository on Fedora</u></b></span></span></div>
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<span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: small;"><br /></span></span></div>
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<span style="font-family: "georgia" , "times new roman" , serif;"><span style="background-color: white; font-size: 18px; line-height: 28.8px;">The </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">RPMFusion</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> repository comes as pre-installed, if not you can follow below commands install and enable it as shown:</span></span></div>
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<span style="background-color: white; line-height: 28.8px;"><span style="color: #0b5394; font-family: "georgia" , "times new roman" , serif; font-size: large;"><u><b>For Fedora 23-20</b></u></span></span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 16.9px;"><span style="font-size: large;"><span style="color: white;"># </span><span style="color: lime;">yum localinstall</span><span style="color: white;"> --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm 
</span></span><span style="color: white;">
</span><span style="color: white; font-size: large;"># </span><span style="color: lime; font-size: large;">yum localinstall --nogpgcheck</span><span style="color: white; font-size: large;"> http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm</span></span></pre>
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<span style="font-family: "georgia" , "times new roman" , serif;"><span style="font-size: 18px; line-height: 28.8px;">Once you’ve all the repositories installed on your system, Now check vlc avalable or not through bellow command line</span></span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 16.9px;"><span style="font-size: large;"><span style="color: white;"># yum </span><span style="color: lime;">info vlc</span><span style="color: white;">
# dnf info </span><span style="color: lime;">vlc         </span><span style="color: white;">[On Fedora 23+ releases]</span></span><span style="color: white;">

Sample Output : -

Loaded plugins: fastestmirror, langpacks, versionlock
Loading mirror speeds from cached hostfile
 * base: mirror.nbrc.ac.in
 * epel: kartolo.sby.datautama.net.id
 * extras: mirror.nbrc.ac.in
 * nux-dextop: li.nux.ro
 * remi-safe: remi.check-update.co.uk
 * rpmforge: kartolo.sby.datautama.net.id
 * updates: mirror.nbrc.ac.in
Available Packages
Name        : vlc
Arch        : x86_64
Version     : 2.2.1
Release     : 6.el7.nux
Size        : 1.5 M
Repo        : nux-dextop/x86_64
Summary     : The cross-platform open-source multimedia framework, player and
            : server
URL         : http://www.videolan.org
License     : GPLv2+
Description : VLC media player is a highly portable multimedia player and
            : multimedia framework capable of reading most audio and video
            : formats as well as DVDs, Audio CDs VCDs, and various streaming
            : protocols. It can also be used as a media converter or a server to
            : stream in uni-cast or multi-cast in IPv4 or IPv6 on networks.
</span></span></pre>
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<div style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="font-family: "georgia" , "times new roman" , serif;">Now install it by running the following command on the terminal.</span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 16.9px;"><span style="font-size: large;"><span style="color: lime;"># yum install vlc
</span><span style="color: white;"># </span><span style="color: lime;">dnf install vlc </span><span style="color: white;">      [On Fedora 23+ releases]</span></span></span></pre>
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<span style="background-color: white; line-height: 28.8px;"><span style="color: #0b5394; font-family: "georgia" , "times new roman" , serif; font-size: large;"><b><u>Starting VLC Player in RHEL/CentOS/Fedora</u></b></span></span></div>
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<span style="font-family: "georgia" , "times new roman" , serif;"><span style="background-color: white; font-size: 18px; line-height: 28.8px;">Run the following command from the </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">Desktop</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> terminal as </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">normal user</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> to Launch the </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">VLC</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> player. (</span><b><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">Note</span><span style="background-color: white; font-size: 18px; line-height: 28.8px;"> : </span><span style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin: 0px; padding: 0px; vertical-align: baseline;">VLC is not supposed to be run as root user</span></b><span style="background-color: white; font-size: 18px; line-height: 28.8px;">).</span></span><br />
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: large;"><span style="line-height: 16.9px;">$ vlc</span></span></pre>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMcjtjPJCTRYQORox-dB4kiwvX-kaBt2S0o_-4FIYrjbZLYz2UE-BYKCsuvdxohcaJV8UY6RN9ycoHuDIXrHf08UDdZrlep3PdSnIvPoW26NQ_T3dpjcqcfkKEnOQFz6eDclbwOr9WZFJj/s1600/vlc_2.2.2-www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMcjtjPJCTRYQORox-dB4kiwvX-kaBt2S0o_-4FIYrjbZLYz2UE-BYKCsuvdxohcaJV8UY6RN9ycoHuDIXrHf08UDdZrlep3PdSnIvPoW26NQ_T3dpjcqcfkKEnOQFz6eDclbwOr9WZFJj/s1600/vlc_2.2.2-www.hackthesec.co.in.jpg" /></a></div>
<div style="background-color: white; border: 0px; font-size: 18px; font-stretch: inherit; line-height: 28.8px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="font-family: "georgia" , "times new roman" , serif;"><br /> <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Update</span> or <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Upgrade</span> <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">VLC</span> player to latest stable version.Run the following command</span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="font-size: large;"><span style="line-height: 16.9px;"><span style="color: white;"># </span><span style="color: lime;">yum update vlc</span><span style="color: white;">
</span><span style="color: lime;"># dnf update vlc      [On Fedora 23+ releases]</span></span></span></pre>
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<span style="background-color: white;"><span style="color: #0b5394; font-family: "georgia" , "times new roman" , serif;"><a href="http://www.hackthesec.co.in/" style="line-height: 28.8px;" target="_blank">www.hackthesec.co.in</a><br /><span style="line-height: 28.8px;"><a href="https://twitter.com/Hackthesecurity">https://twitter.com/Hackthesecurity</a></span></span></span></div>
</div>

How Install VLC Media Player in RHEL/CentOS 7/6 and Fedora 23-20

VLC Media Player in RHEL / CentOS / Fedora VLC media player (commonly known as VLC) is a portable, free and open-source, cross-platform...

How to Install and Setup LXC Linux Containers on CentOS / RHEL / Ubuntu

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<u><span style="color: red;"><i>Install and Setup LXC Linux Containers on <a href="http://www.hackthesec.co.in/search/label/Centos" target="_blank">CentOS </a>/ <a href="http://www.hackthesec.co.in/search/label/RHEL" target="_blank">RHEL</a> / <a href="http://www.hackthesec.co.in/search/label/Ubuntu" target="_blank">Ubuntu</a></i></span></u></h1>
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LXC stands for Linux Containers.</div>
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Linux containers are light-weight “<b><a href="http://www.hackthesec.co.in/search/label/virtualization" target="_blank">virtualization</a></b>” methods that runs multiple virtual units simultaneously on a single control host on a single Linux kernel.</div>
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The Linux kernel contains cgroups for resource isolation (CPU, memory, block I/O, network, etc, ), which does not require starting any virtual machines.<br />
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Cgroups also provides namespace isolation to completely isolate application view of the operating environment, including process trees, networks, userids and mounted filesystems.</div>
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LXC is open source software and licensed under GNU LGPLv2.1+ license.</div>
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Containers actually make use of kernel features called namespaces, cgroups, and chroots, to carve off a contained area.</div>
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So, the end result of LXC looks much like a virtual machine, but without any hypervisor.</div>
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<span style="color: #0b5394;"><u>1. Pre-req for LXC Install</u></span></h3>
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Before you install LXC, make sure your system is up-to-date using yum update as shown below.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">yum </span><span style="color: lime; font-size: medium;">update</span></span></pre>
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LXC is dependent on two libraries; libpcap and libcgroup. This also requires busybox and bridge utilities.</div>
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Install the following required packages for our LXC install.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">yum install </span><span style="color: lime; font-size: medium;">libcap-devel libcgroup busybox wget bridge-utils</span></span></pre>
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Let us make sure we got all the compilers and related development tools that are required to compile and install any software from source code.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">yum groupinstall "</span><span style="color: lime; font-size: medium;">Development tools</span><span style="color: white; font-size: medium;">"</span></span></pre>
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<u><span style="color: #0b5394;">2. Download LXC Linux Containers</span></u></h3>
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Download the latest version of the LXC from <a href="https://linuxcontainers.org/lxc/downloads/" style="color: #dd0000; margin: 0px; padding: 0px; word-wrap: break-word;">Linux Containers Project</a>.</div>
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Use wget to download the tar ball of the latest stable version of LXC to your machine as shown below.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">wget </span><span style="color: white; font-size: medium;">http://linuxcontainers.org/downloads/lxc-1.1.5.tar.gz</span></span></pre>
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If you get a certificate related error message while using the above wget, then use the no-check-certificate option as shown below.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">wget --no-check-certificate</span><span style="color: white; font-size: medium;"> https://linuxcontainers.org/downloads/lxc-1.1.5.tar.gz</span></span></pre>
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Alternatively, if you prefer, you can also use git clone to download the latest development version or stable version as shown below.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">git clone</span><span style="color: white; font-size: medium;"> git://github.com/lxc/lxc -b {branch}</span></span></pre>
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In the above command, the {branch} can either be “master” for the current development branch, or “stable-1.0″ for the stable update branch of the 1.0 version.</div>
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<u><span style="color: #0b5394;">3. Configure Bridged Adapter</span></u></h3>
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Next, create a bridged adapter and configure the static IP on the bridged adapter as shown in the following ifcfg-eth0 example. Ensure your physical adapter points to this bridged adapter in ifcfg-eth0.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$</span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;"> cd /etc/sysconfig/</span><span style="color: lime; font-size: medium;">network-scripts</span><span style="color: white; font-size: medium;">

</span></span><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$</span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;"> vi </span><span style="color: lime; font-size: medium;">ifcfg-br0</span><span style="color: white; font-size: medium;">

DEVICE="br0"
BOOTPROTO="static"
IPADDR="xxx.xxx.xxx.xxx"
NETMASK="255.255.255.xxx"
ONBOOT="yes"
TYPE="Bridge"
NM_CONTROLLED="no"</span></span></pre>
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Replace all the “xxx” in the above file with the values that matches your ip-address and networkmask. For example, change the IPADDR value in the above file to the ip-address of your machine.</div>
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<u><span style="color: #0b5394;">4. Install LXC Linux Container</span></u></h3>
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Next, untar the LXC tar ball, that we downloaded earlier, execute the ./configure, and do make and make install, to install the LXC on your system as shown below.</div>
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By default, this will install all the lxc binaries under /usr/local/bin directory.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">tar xvfz </span><span style="color: lime; font-size: medium;">lxc-1.1.5.tar.gz</span><span style="color: white; font-size: medium;">

</span></span><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">make && make install</span></span></pre>
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The following are few of the last few lines from the output for the above ./configure command.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">./configure
...
...
config.status: creating src/python-lxc/setup.py
config.status: creating src/lua-lxc/Makefile
config.status: executing depfiles commands
</span><span style="color: lime; font-size: medium;">config.status: executing default commands
</span><span style="color: white; font-size: medium;">----------------------------
Environment:
 - compiler: gcc
 - distribution: <a href="http://www.hackthesec.co.in/search/label/Centos" target="_blank">centos</a>
</span><span style="color: lime; font-size: medium;"> - init script type(s): sysvinit
</span><span style="color: white; font-size: medium;"> - rpath: no
 - GnuTLS: no
</span><span style="color: lime; font-size: medium;"> - Bash integration: yes
</span><span style="color: white; font-size: medium;">Security features:
 - Apparmor: no
</span><span style="color: lime; font-size: medium;"> - Linux capabilities: yes
</span><span style="color: white; font-size: medium;"> - seccomp: no
 - SELinux: no
 - cgmanager: no
Bindings:
 - lua: no
 - python3: no
Documentation:
 - examples: yes
 - API documentation: yes
 - user documentation: no
Debugging:
 - tests: no
</span><span style="color: lime; font-size: medium;"> - mutex debugging: no
</span><span style="color: lime; font-size: medium;">Paths:
</span><span style="color: lime; font-size: medium;"> - Logs in configpath: no</span></span></pre>
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The following are the last few lines from the output for the above make command.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">make</span><span style="color: white; font-size: medium;">
...
Building full member lists recursively...
Adding members to member groups.
...
</span><span style="color: lime; font-size: medium;">Generating style sheet...
</span><span style="color: white; font-size: medium;">Generating index page...
</span><span style="color: lime; font-size: medium;">Generating page index...
</span><span style="color: white; font-size: medium;">Generating example documentation...
Generating file sources...
</span><span style="color: lime; font-size: medium;">Generating code for file /usr/save/lxc-1.1.5/src/lxc/attach_options.h...
</span><span style="color: white; font-size: medium;">Generating code for file /usr/save/lxc-1.1.5/src/lxc/lxccontainer.h...
Generating code for file /usr/save/lxc-1.1.5/src/lxc/lxclock.h...
</span><span style="color: lime; font-size: medium;">Generating file documentation...
Generating docs for file /usr/save/lxc-1.1.5/src/lxc/attach_options.h...</span><span style="color: white; font-size: medium;">
...
Generating file member index...
make[2]: Leaving directory `/usr/save/lxc-1.1.5/doc/api'
make[2]: Entering directory `/usr/save/lxc-1.1.5/doc'
...
</span><span style="color: lime; font-size: medium;">Making all in hooks
make[1]: Entering directory `/usr/save/lxc-1.1.5/hooks'
make[1]: Nothing to be done for `all'</span><span style="color: white; font-size: medium;">.
...</span></span></pre>
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The following are the last few lines from the output for the above make install command.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">make install</span><span style="color: white; font-size: medium;">
...
Making install in hooks
make[1]: Entering directory `/usr/save/lxc-1.1.5/hooks'
 /bin/mkdir -p '/usr/local/share/lxc/hooks'
</span><span style="color: lime; font-size: medium;"> /usr/bin/install -c clonehostname mountecryptfsroot ubuntu-cloud-prep squid-deb-proxy-client '/usr/local/share/lxc/hooks'
</span><span style="color: white; font-size: medium;">...
/bin/mkdir -p /usr/local/var/lib/lxc
/bin/mkdir -p /usr/local/var/cache/lxc
 /bin/mkdir -p '/usr/local/lib/pkgconfig'
</span><span style="color: lime; font-size: medium;"> /usr/bin/install -c -m 644 lxc.pc '/usr/local/lib/pkgconfig'
</span><span style="color: white; font-size: medium;">...</span></span></pre>
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<u><span style="color: #0b5394;">5. Create Soft Link for LXC Shared Libraries</span></u></h3>
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Execute lxc-info to verify that the LXC is installed successfully. If everything is installed properly, we’ll see a message saying that the give container name (for example, test) doesn’t exist. We have not created any container at this stage. We just want to make sure this command is not throwing any shared library related errors.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">lxc-info --name test</span><span style="color: white; font-size: medium;">
test doesn't exist</span></span></pre>
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Depending on how things on configured on your system, you might also get the following liblxc.so.1 library related error message.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">lxc-info --name test
</span><span style="color: lime; font-size: medium;">lxc-info: error while loading shared libraries: liblxc.so.1: cannot open shared object file: No such file or directory</span></span></pre>
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In this case, to fix it, create a link called libxc.so.1 as shown below, which will point to the correct version of the liblxc.so.x.x.x file.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">ln -s </span><span style="color: lime; font-size: medium;">/usr/local/lib/liblxc.so.1.1.5 /lib64/liblxc.so.1</span><span style="color: white; font-size: medium;">

</span></span><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: white; font-size: medium;">ls -l /lib64/liblxc.so.1
</span><span style="color: lime; font-size: medium;">lrwxrwxrwx. 1 root root 30 Jan 20 09:17 /lib64/liblxc.so.1 -> /usr/local/lib/liblxc.so.1.1.5</span></span></pre>
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<u><span style="color: #0b5394;">6. Verify LXC Setup and Configuration</span></u></h3>
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Next, you can also execute the lxc-checkconfig to verify that your lxc environment is setup correctly.</div>
<div style="background-color: white; color: #111111; font-family: Georgia, 'Times New Roman', Times, serif; font-size: 16px; line-height: 26px; margin-bottom: 26px; padding: 0px; word-wrap: break-word;">
The following will have output in four different sections: 1) Namespaces, 2) Control Groups 3) Misc and 4) Checkpoint/Restore. Partial output is shown below.</div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-size: medium; line-height: 1.3em;">root@hackthesec:~$ </span><span style="background-color: transparent; line-height: 15.6px;"><span style="color: lime; font-size: medium;">lxc-checkconfig</span><span style="color: white; font-size: medium;">
Kernel configuration not found at /proc/config.gz; searching...
</span><span style="color: lime; font-size: medium;">Kernel configuration found at /boot/config-2.6.32-431.el6.x86_64
</span><span style="color: white; font-size: medium;">--- Namespaces ---
Namespaces: enabled
Utsname namespace: enabled
Ipc namespace: enabled
Pid namespace: enabled
</span><span style="color: lime; font-size: medium;">User namespace: enabled
</span><span style="color: white; font-size: medium;">Network namespace: enabled
</span><span style="color: lime; font-size: medium;">Multiple /dev/pts instances: enabled
</span><span style="color: white; font-size: medium;">--- Control groups ---
Cgroup: enabled
Cgroup namespace: enabled
Cgroup device: enabled
Cgroup sched: enabled
Cgroup cpu account: enabled
..
--- Misc ---
</span><span style="color: lime; font-size: medium;">Veth pair device: enabled
</span><span style="color: white; font-size: medium;">Macvlan: enabled
Vlan: enabled
Bridges: enabled
</span><span style="color: lime; font-size: medium;">Advanced netfilter: enabled
</span><span style="color: white; font-size: medium;">..
</span><span style="color: lime; font-size: medium;">--- Checkpoint/Restore ---
CONFIG_EVENTFD: enabled
CONFIG_EPOLL: enabled</span><span style="color: white; font-size: medium;">
..
Note : Before booting a new kernel, you can check its configuration
</span><span style="color: lime; font-size: medium;">usage : CONFIG=/path/to/config /usr/local/bin/lxc-checkconfig</span></span></pre>
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If everything is configured properly on your system, in the above output, all of the options in the above groups should say “enabled”.</div>
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