Hack The Sec-Leading Resource Of Linux Tutorial: Nextcloud

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Install and Configure Nextcloud on CentOS / RHEL 7 
 
Nextcloud is functionally very similar to the widely used Dropbox, with the primary functional difference being that Nextcloud is free and open-source, and thereby allowing anyone to install and operate it without charge on a private server.  
 
In contrast to proprietary services like Dropbox, the open architecture allows adding additional functionality to the server in form of so-called applications. 
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Nextcloud is an actively maintained fork of ownCloud. 
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Some of the Key features of Nextcloud are listed below: 
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<ul style="text-align: left;">
<li>File access & sharing </li>
<li>Security & control </li>
<li>Mobile & desktop clients  </li>
<li>External storage </li>
<li>Calendar & Contacts  </li>
<li>Secure audio & video calls</li>
<li>Collabora Online Office</li>
<li>Videos of Nextcloud in action</li>
</ul>
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Requirement to Install NextCloud on RHEL AND CENTOS</div>
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Minimum of 512 MB RAM 
Web Server : Apache (httpd) / Nginx 
Database Server : MariaDB / MySQL / PostgreSQL 
 
PHP 5.4 + 
 
Installation 
======== 
Use the below yum command to install Apache Web Server (httpd), PHP packages and its other dependent packages. 
 
In the default CentOS and RHEL repositories PHP 5.4 packages are available 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; color: white; font-family: monospace, serif; font-size: 14px; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum install httpd php php-mysql sqlite php-dom php-mbstring php-gd php-pdo php-json php-xml php-zip php-gd curl php-curl php-mcrypt php-pear</pre>
Start and startup enable apache web service using this command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">systemctl start httpd ; systemctl enable httpd</pre>
MariaDB database for Nextcloud 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum install -y mariadb-server mariadb</pre>
 
Start and startup enable MariaDB service using this command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">systemctl start mariadb; systemctl enable mariadb</pre>
For set MariaDB root password use the following command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">mysql_secure_installation</pre>
After completed the MariaDB installation just create a database for next-cloud application for me my database name is "nextcloud_db". 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">[root@nextcloud ~]# mysql -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 5.5.47-MariaDB MariaDB Server
Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> create database nextcloud_db;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]></pre>
Create a database user (nxtuser) and grant all the privileges to the user on the database "nextcloud_db" 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">MariaDB [(none)]> grant all on nextcloud_db.* to 'nxtuser'@'localhost' identified by 'Nextcloud@123#';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> exit
Bye
[root@nextcloud ~]#</pre>
Download the latest version of NextCloud 
 
First Install two packges on your server using bellow command 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">yum install wget bzip2 -y</pre>
After that download the file from nextcloud official website - <a href="https://download.nextcloud.com/server/releases/">ClickHere</a> 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">wget https://download.nextcloud.com/server/releases/nextcloud-9.0.53.tar.bz2</pre>
When your download is complete just extract the downloaded "nextcloud-9.0.53.tar.bz2" file to Web Server document root (/var/www/html) using bellow command. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">tar -jxpvf nextcloud-9.0.53.tar.bz2 -C /var/www/html/</pre>
Set the required permissions on nextcloud directory and its sub directories and files 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">chown -R apache:apache nextcloud /var/www/html/nextcloud</pre>
Open the ports in firewall for nextcloud (or you can stop the firewall) using bellow command. 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">[root@nextcloud ~]# firewall-cmd --permanent --zone=public --add-service=http
[root@nextcloud ~]# firewall-cmd --permanent --zone=public --add-service=https
[root@nextcloud ~]# firewall-cmd --reload</pre>
In my Case I am putting selinux in disabled mod  using below command you can use it as permissive mod 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">setenforce 0</pre>
For Permanently disabled edit the following line and find this line"SELINUX=enforcing" to disabled 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">vi /etc/sysconfig/selinux</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;"># This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
# targeted - Targeted processes are protected,
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
</pre>
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Now Access nextCloud portal from Web Browser 
 
After Complete the nextcloud installation you can access it from your web browser using your system ip or server ip 
 
In my case my server ip is - 192.168.2.251 
 
Specify the user name as admin and password that you want to set, Select the Database type as MariaDB and mentioned the database name, database user and its credentials. Once you’re are done with settings then click on finish Setup. 
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Change the upload file size limit for nextcloud and restart the apache service 
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">vi /etc/php.ini
============================
post_max_size = 30M
upload_max_filesize = 30M</pre>
<pre style="background: rgb(68, 67, 65); border-radius: 6px; border: 1px solid rgb(227, 227, 227); box-sizing: border-box; clear: none !important; margin-bottom: 10px !important; margin-top: 10px !important; overflow: auto; padding: 10px !important; width: auto !important; word-break: break-all;">systemctl restart httpd</pre>
Now start uploading the files and share with your contacts and whatever you want 
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