Linux User & Group Management + sudo — Complete Admin Guide
Every Linux server has human admins, deploy users, database accounts, and service identities. Mismanaged users are a se…
Linux LVM Complete Guide — Create, Extend, and Resize Volumes (RHEL & Ubuntu)
Disk space runs out on production servers — databases grow, logs fill /var , upload directories expand. With LVM (Logica…
Nginx Reverse Proxy with Let's Encrypt SSL — Complete Production Guide
Running multiple web apps on one server — Node.js on port 3000, a Python API on 8080, a static site on 9000 — is normal…
How to Install Docker on AlmaLinux and Ubuntu (Production Setup Guide)
Docker packages applications with their dependencies into containers — isolated, portable, and consistent from laptop t…
rsync Backups on Linux — Complete Guide (Local, Remote SSH & Automation)
Every Linux server needs backups. rsync is the standard tool for incremental file sync — copy only what changed, over l…
How to Use journalctl on Linux — Read, Filter and Troubleshoot System Logs
When a Linux service crashes, fails to start, or behaves oddly, the answer is almost always in the logs. On modern dist…
SSH Key Authentication on Linux — Complete Setup Guide (Ed25519)
Password-based SSH login is the #1 way Linux servers get compromised. Bots guess thousands of combinations per hour; on…
SSH Hardening Checklist for Linux: Keys, No Root, Custom Port, AllowUsers
SSH is the front door to every Linux server. It is also the most attacked service on the internet — bots scan port 22 c…
Remove and Disable ABRT on RHEL 8 — Complete Security Hardening Guide
ABRT (Automatic Bug Reporting Tool) was designed to collect crash dumps and send them to bug trackers. On RHEL 8 and Fe…
How to Patch the Linux Kernel Safely on RHEL and Ubuntu (Production Guide)
Kernel vulnerabilities are among the most dangerous findings in a security audit. A single unpatched local privilege es…
Linux Firewall Basics: ufw vs firewalld — Complete Quick-Start Guide
Every Linux server exposed to the internet needs a firewall. Without one, every service listening on a port is reachabl…
Detect SSH Brute-Force Attacks on Linux (auth.log + fail2ban) — Complete Guide
Port 22 is scanned constantly. Bots hammer every public Linux server with thousands of password guesses per hour. If pa…
![[HIGH PRIORITY] Apache Tomcat Tribes EncryptInterceptor RCE (CVE-2026-34486)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sGtZa7ptXUtO9-n5pyQ-k66DW1HAUY60Pcr4KqcpQIl6ZQ6GSJ-nIGhDUpSG8Kt4_HUYw5NK9_LoKYg-2qw1T-GAVwMaQzWCT9p-G40pZ6juoFDWMPkw9gbDlRKCMniXs_YaBfi2ZPkOD17d6Xk0roYBmv1Xd5wHI0I3FjrzCk)
[HIGH PRIORITY] Apache Tomcat Tribes EncryptInterceptor RCE (CVE-2026-34486)
⚠ HIGH PRIORITY — CISA KEV (Aug 4, 2026). CVE-2026-34486 is a fail-open regression in Apache Tomcat Tribes EncryptInterc…
![[HIGH PRIORITY] Progress Kemp LoadMaster Unauth Root RCE (CVE-2026-8037)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uuSyF8o7mzZvPHJXA0-SvvyY2ERVglmDuiCpF0fLE7g6zRaD5zu2RSDKH6PAegdVFE-xKCKmIz8B5VzD9HJdiZ9TqMolpKviG_kr0F8zndGG5cozgrMerLW-nt78Bs_WKwdCDenetfALNhcrTeukaBaengn1P4aJt2oM5I7hSX57XCLA)
[HIGH PRIORITY] Progress Kemp LoadMaster Unauth Root RCE (CVE-2026-8037)
⚠ HIGH PRIORITY — CISA KEV (Aug 7, 2026). Active exploitation confirmed. CVE-2026-8037 is an OS command injection in Pro…
![[HIGH PRIORITY] PaperCut NG/MF Authentication Bypass (CVE-2026-81578)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_u-lcRQW83H6yDZTbD46QYciL_GHh4D8lwi7_lLLYigUsg5DfTE8RwEW4Yag8Cc-EpdT-cthDVZTYI8pTlWdEayPnKVXKov9bY7b8WgWmr5nknm6UMEZGMfr_3eIfrsDQcKSyP-FZ0yROiualCl4ZIceWu1foTd2HIp4pbjq_GXoVL6)
[HIGH PRIORITY] PaperCut NG/MF Authentication Bypass (CVE-2026-81578)
⚠ HIGH PRIORITY — CISA KEV (Aug 31, 2026). CVE-2026-81578 is a missing authentication flaw (CWE-306) in the PaperCut NG/…
![[HIGH PRIORITY] PaperCut NG/MF Pre-Auth RCE (CVE-2026-82078)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uHpDx3q1xIBLGMipTMeFHl2dsv-Mme2u9HdFwXw-T7Sf-mOzEoDiMHmdAS5Hq_If64TPmD-cpA_Qn7XR_wpn1bUfu2qX_c8CspuS9oAwdAnwdiEJU_kVHLvYLVirmCaEtKr157oi-fLUfrkqTtrLCgt107sOBkS_MNez1cfV9pkt4)
[HIGH PRIORITY] PaperCut NG/MF Pre-Auth RCE (CVE-2026-82078)
⚠ HIGH PRIORITY — CISA KEV (Aug 31, 2026). Actively exploited zero-day. CVE-2026-82078 is an unsafe dynamic class-loadin…
![[HIGH PRIORITY] Red Hat ABRT libreport Content Injection (CVE-2026-54231)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sFsSDtea8oXSzTExBZMMcpxW1VbsFhDue1vNGvAlOmcsQp4kkAGUUvxQz_TIVkReMA090LJo-lj0AkSIW_np44V3GeUImal5o8jbBLI8_N3cS72UDhVbTcQiKeusYZs65tYPAy23kO6wp7R3Zk54-uMkPOQVeqfNpEmoDpPDI)
[HIGH PRIORITY] Red Hat ABRT libreport Content Injection (CVE-2026-54231)
⚠ HIGH PRIORITY — Red Hat 2026 advisory. CVE-2026-54231 is a content injection flaw in ABRT/libreport event handler scri…
![[HIGH PRIORITY] Red Hat libuser Race Condition LPE (CVE-2015-3246)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vZCDhOugrwcf7rE9yJaT_M3p6cP_VkkjgPM13n2ducSWWI47S8XDaI1rtJ4ZwvA55d24J1BjZ5pkiqKpJqelBoAXrBEiz8DOWxqdyehSoEEY2gTzUDVy_CYzdJpYwA2dItseE69BKN4AmKEg-VlXll2SNfYyXefID9nE9M-V4XJQ)
[HIGH PRIORITY] Red Hat libuser Race Condition LPE (CVE-2015-3246)
⚠ HIGH PRIORITY — CISA KEV (Aug 26, 2026). CVE-2015-3246 is a race condition in Red Hat libuser . Authenticated local use…
![[HIGH PRIORITY] Red Hat ABRT Privilege Escalation (CVE-2015-5287)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vBuF1ISgo_0d6WTXtPDJnS7QTRNK7rsCrcz1FOatE4dOpODneXK072VfGdIQBe_nKcW9ld1EKx8vnMDbhBIRb5gyH7gQ3_RAcBWSc_4poEkCJ4arfZWTPZKgUcD4D13NBNGB9SQGEaYb6ZQvtXLfPIgVOj3yFbt6AV6NMK)
[HIGH PRIORITY] Red Hat ABRT Privilege Escalation (CVE-2015-5287)
⚠ HIGH PRIORITY — CISA KEV (Aug 26, 2026). CVE-2015-5287 is a privilege escalation in Red Hat Automatic Bug Reporting To…