#Linux

69 tutorials tagged with "Linux"

USN-8955-1 Fixes 5 Nginx CVEs. 24.04 Stays on 1.24.0.

USN-8955-1 patches five Nginx security flaws across Ubuntu releases. Here is how to audit configs, apply package updates, and verify server stability.

troubleshooting

KSMBD Has No CVE Yet. One Count Is Six. Another Is Five.

Cyber Kendra counted six ZDI reports on Oct. 21 and 22. Another writeup counted five. As of Oct. 23, the KSMBD pair still had no CVE.

troubleshooting

Directory Server Has Two Advisory IDs. One Is the Critical.

LinuxCompatible calls RHSA-2026:79217 the only Critical. An October 11 note says match RHSA-2026:64793. The two CVE lists do not match.

server-config

X.Org Patched Twelve CVEs. Fedora Shipped One.

X.Org's Oct. 7 advisory fixes xorg-server 21.1.25 and Xwayland 24.1.14. One glamor issue skips the 21.1 line. Fedora 44's notice is Xwayland only.

security

AnyDesk 8.0.3 Fixed It. The Changelog Said Crash.

The Hacker News, Oct. 9: AnyDesk Linux 8.0.3 patched a pre-auth flaw in June. The changelog called it a crash. No CVE as of that story.

security

NVIDIA's Sept. 30 List: Four Driver Builds, Then Update

GamingOnLinux lists four safe NVIDIA Linux driver builds from the Sept. 30 bulletin. The high scores are local memory bugs. Guest drivers are a separate row.

troubleshooting

F5 BIG-IP APM Grew a Fileless Rootkit. Hashes Will Not Save You

Sophos and ESET describe PoisonedRefresh: a Linux implant that serves a PHP web shell from memory on BIG-IP APM webtop files. Disk looks clean. Check mmap, a pipe, and HTTP 201 pretending to be CSS.

security

Google Says Attackers Are Going After AI Coding Tools

GTIG maps token theft from GitHub Actions runners and junk in hidden AI workspaces. What to change on Linux CI and laptops this week.

security

OpenVPN 2.7.7 Fixes Seven CVEs. Patch Linux First.

OpenVPN 2.7.7 patches CVE-2026-84732 on every platform, hardens Linux Netlink, and stops --stale-routes-check from deleting static routes. Here is how to upgrade and verify.

#Linux

USN-8955-1 Fixes 5 Nginx CVEs. 24.04 Stays on 1.24.0.

KSMBD Has No CVE Yet. One Count Is Six. Another Is Five.

Directory Server Has Two Advisory IDs. One Is the Critical.

X.Org Patched Twelve CVEs. Fedora Shipped One.

AnyDesk 8.0.3 Fixed It. The Changelog Said Crash.

NVIDIA's Sept. 30 List: Four Driver Builds, Then Update

F5 BIG-IP APM Grew a Fileless Rootkit. Hashes Will Not Save You

Google Says Attackers Are Going After AI Coding Tools

OpenVPN 2.7.7 Fixes Seven CVEs. Patch Linux First.

The Ted Backdoor Was Built Into HAProxy. Verify the Binary.

RHEL to Debian: Debug the Migration CERN Just Committed To

CVE-2026-53362: How to Patch the IPv6 Kernel Flaw

DNS Resolution Failures: A Systematic Guide to Diagnosing and Fixing DNS Issues on Linux

Linux Process Management: A Complete Guide to htop, systemctl, and Beyond

Linux Swap and ZRAM: A Complete Configuration Guide for Server Performance

Linux User and Group Management: A Complete Server Administration Guide

How to Set Up nftables as Your Linux Firewall in 2026

Linux Log Rotation and Disk Space Management: A Practical Guide

Nginx Security Hardening: A Complete Guide for Production Servers

Linux Copy Fail Vulnerability: CVE-2026-31431 Explained and How to Patch

Docker Image Optimization: Slim Bases, Multi-Stage Builds, and the 832MB Lesson

Systemd Service Management in 2026: Best Practices for Production Servers

SSH Connection Troubleshooting: A Systematic Guide to Debugging Remote Access Issues

Your Server's OOM Killer Is Not the Problem — Your Memory Configuration Is

Automating Linux Server Hardening with CIS Benchmarks: Stop Doing This Manually

Microsoft Defender for Endpoint on Linux Just Started Silently Disabling Itself — Here's How to Check Yours

journalctl Mastery: Stop Grepping Through /var/log Like It's 2005

Your Server Is Slow and You Don't Know Why — A Systematic Linux Performance Debugging Guide

GhostLock CVE-2026-43499: 15-Year-Old Linux Root Exploit

Linux Network Troubleshooting: From ping to tcpdump — A Systematic Diagnostic Workflow

SSH Hardening and Fail2Ban: The Complete Guide to Locking Down Your Linux Server

Januscape: 16-Year-Old Linux KVM Flaw Allows VM Escape on Intel and AMD Systems

Linux Disk Full? A Systematic Guide to Finding and Fixing the Problem

Docker Container Resource Limits with cgroups v2: A Complete Guide for 2026

Linux OOM Killer: How to Diagnose and Prevent Out-Of-Memory Process Kills

How to Check if Your Linux Server Is Affected by the PAM Backdoor Discovered in 2026

Linux Kernel 7.1 Is Here: What Server Administrators Need to Know

How to Fix Systemd "Failed to Start Service" Errors on Linux

OpenSSL CVE-2026-45447: Critical PKCS#7 Vulnerability and Server Patch Guide

Out of Memory on Production: A Methodical Troubleshooting Workflow for Linux Servers

systemd Service Hardening: Sandboxing with ProtectSystem, PrivateTmp, and CapabilityBoundingSet

File Integrity Monitoring with AIDE: Detect Unauthorized Changes on Linux Servers

Linux I/O Scheduling: Choosing the Right Scheduler for Database and Web Servers

Automated Linux Security Auditing with Lynis: Full System Scan and Remediation

Btrfs Snapshots and Send/Receive: Incremental Backup Strategy for Linux Servers

Linux sysctl Tuning: Kernel Parameters Every Server Admin Should Know

Troubleshooting High CPU Usage with perf: From Flame Graphs to Fix

Linux Namespace Isolation: Understanding Container Foundations at the Kernel Level

Advanced Fail2ban Configuration: Custom Jails, Filters, and Actions

Linux LVM Volume Management: Resize, Snapshots, and Migration Without Downtime

Linux Auditd Monitoring: Track Every System Call for Security Compliance

From Cron to Systemd Timers: Modern Linux Job Scheduling

Linux Disk Space Crisis: Tools and Commands to Find What's Eating Your Storage

SELinux vs AppArmor: Choosing the Right Linux Security Module in 2026

Mastering journalctl: Advanced Linux Log Management for Sysadmins

Linux Performance Troubleshooting: Complete Guide for Server Administrators

Ubuntu 26.04 LTS Preview: What's New and Should You Upgrade?

Server Backup Strategies: Comprehensive Data Protection Guide

Monitoring Linux Servers with Grafana and Prometheus

Mastering iptables: Linux Firewall Fundamentals

Linux Troubleshooting: Essential Commands and Techniques

Log Analysis Techniques: Parsing and Monitoring Server Logs

Log Rotation with logrotate: Linux System Management

Network Diagnostics Guide: Essential Tools and Techniques

SSH Key-Based Authentication for Secure Server Access

SSH Server Hardening: Securing Remote Server Access

Systemd Service Management: Complete Guide for Linux Administrators

Ubuntu 22.04 Server Setup: Complete Configuration Guide

UFW Firewall Configuration: Securing Linux Servers