4 Quick CLI One-Liners to Troubleshoot cPanel Server Spikes
Quick CLI one-liners for cPanel and CloudLinux servers to inspect top client IPs, track 404/500 error spikes, check ModSecurity blocks, and audit active web sockets.
How Do I Update This OS?
A quick reference guide for updating operating systems: Windows with UniGetUI, Debian/Ubuntu (apt vs dist-upgrade), AlmaLinux (dnf/yum), Arch (pacman), Alpine, and FreeBSD.
Under Siege: Top 15 WordPress & CMS RCEs and Zero-Dependency File Integrity Auditing
A breakdown of 2026 critical WordPress & CMS RCE attack vectors (including the wp2shell chain) and two zero-dependency Bash & PHP file integrity auditing scripts to detect injected backdoors.
Migrating away from WordPress at Lunch with AI
How I migrated a 10-year-old WordPress blog with 88 articles and 136 media assets to Astro SSG in a single lunch break using AI pair programming.
Self-Hosting Docker Microservices: Traefik 3, Portainer & Cloudflare Tunnels
How to architect a modern self-hosted homelab stack using Docker Compose, Traefik 3 reverse proxy, Portainer, and Cloudflare Tunnels.
Hardening Debian 12 & Ubuntu Servers: The 10-Step Security Audit Checklist
A practical 10-step security hardening checklist for Debian 12 and Ubuntu servers: SSH keys, UFW firewall, Fail2ban, and kernel sysctl tuning.
Basic Setup Steps for Your First Proxmox Server
A step-by-step guide to configuring your first Proxmox VE hypervisor: no-subscription repository setup, SSH key hardening, Fail2ban, and LXC templates.
From Batch Loops to Go Binaries: A Scripter's Language Evolution
From late-90s batch loops and executable packers to C segfaults, Python venvs, and finding Go nirvana: a practical scripter's journey.
CCTV-Watch: Headless RTSP Stream Capture and OpenCV Motion Telemetry
Building a lightweight, headless Python surveillance daemon that connects to IP camera RTSP streams and uses OpenCV frame differencing to eliminate false motion alerts.
Resolving Avorion Server Error: "Attempt to Call Field 'Contents' (A Nil Value)"
How to fix the Avorion dedicated server crash error 'attempt to call field contents a nil value' caused by corrupted inventory scripts.
Troubleshooting Anaconda Installation Issues on Debian 12
How to troubleshoot common Anaconda Python installation errors, path conflicts, and missing shared libraries on Debian 12 Bookworm.
A Comprehensive Guide to Upgrading GitLab from Major Version to Major Version in Debian
Step-by-step guide to upgrading GitLab across major versions on Debian servers following the official upgrade path without breaking migrations.
How to Switch from RSA to Ed25519 SSH Keys in OpenSSH
How to generate and migrate to Ed25519 SSH keys in OpenSSH, streamline your local ssh config, and handle legacy RSA SHA-1 host connections.
Reset Wordpress Password via PHPMyAdmin or SQL Commands
How to reset an admin password on WordPress using direct MD5 SQL queries in phpMyAdmin or the MySQL command line when locked out.
Upgrade Debian Stretch (9) to Buster (10)
Complete walkthrough for upgrading Debian 9 Stretch to Debian 10 Buster via SSH: updating apt sources.list, dist-upgrade, and system cleanup.
Essential cPanel & Apache CLI Snippets: Inodes, Connections, and Symlink Audits
A collection of practical cPanel and Apache SSH one-liners for inode diagnostics, active server connections, and security symlink audits.
Exim & cPanel Mail Forensics: Top Senders, PHP Scripts, and Queue Purging
Essential Exim and cPanel CLI one-liners to trace spam outbreaks, identify rogue PHP mail scripts, and purge thousands of frozen spool messages.
VPS Error: Unable to create cgroup for vm**: No such file or directory
How to resolve the KVM error 'Unable to create cgroup for vm: No such file or directory' by restarting the libvirtd daemon on Linux hypervisors.
Setting Up Fail2ban to Block SSH Brute Force Attacks on Debian and Ubuntu
How to configure Fail2ban on Debian and Ubuntu servers with custom SSH jail rules, IP whitelisting, and quick CLI commands to manage banned IPs.
How to Clear RAM Memory, Cache, Buffer and Swap Space on Linux in SSH
Simple terminal commands to safely drop page cache, dentries, inodes, and reset swap memory on Linux servers via SSH.
Jitsi Meet Logo and Text Change
How to customize the logo, watermark, and UI text on a self-hosted Jitsi Meet video conferencing server by editing interface_config.js.
How to Create a Simple Systemd Service to Run Background Scripts on Linux
How to create a custom systemd service unit on Linux to keep Python, Node.js, or Bash scripts running in the background with auto-restart on crash.
What is DNS Flag Day? (1st Feb 2019)
Explaining DNS Flag Day 2019: major DNS providers and software vendors dropping EDNS workarounds to enforce strict RFC protocol compliance.
Raspberry Pi PIR Movement Detection and CCTV Security System
Building a standalone DIY security camera using a Raspberry Pi, an HC-SR501 PIR motion sensor, and automated snapshot capture with email alerts.
cPanel Professional Certification (FREE)
How to earn the official cPanel Professional Certification (CPP) for free through cPanel University, covering server administration fundamentals.
Clearing Minecraft Server Lag
Troubleshooting and fixing lag on modded Minecraft Forge and Spigot servers by diagnosing chunk generation, flowing liquids, and memory leaks.
Fixing a Stalled Exim Mail Queue and Clearing Frozen Spool Files on cPanel/WHM
How to fix a jammed Exim mail queue on cPanel and WHM servers using SSH commands to inspect traffic, delete frozen messages, and reset corrupt spool locks.
Show OpenVZ / Virtuozzo Container Disk Space and Usage Percentage
A quick Awk one-liner to list all OpenVZ / Virtuozzo VPS containers sorted by disk space with calculated percentage usage.
How to Benchmark Disk I/O Speed on Linux VPS, VMs and Containers with dd and fio
How to accurately benchmark disk write speeds and 4K IOPS inside Linux VPS instances, KVM virtual machines, and Proxmox LXC containers using dd and fio.
Automating IRC Network Security in the 2000s: Defending Against Drone Floods, Open Proxies, and SDBot
Looking back at mid-2000s IRC network defence: building multi-network security bots with real-time SNOTICE sniffing, Blitzed OPM lookups, and auto-G-Lines.
Fixing Minecraft Server issues - Exception while updating neighbours
How to resolve the Exception while updating neighbours crash on Minecraft servers caused by corrupt redstone, fluids, or hopper block states.
Sexiest Looking Uptime Monitor w/ API
Overview of StatusCake and modern uptime monitoring services featuring public status badges, REST APIs, and multi-location ping checks.
Setting up Automated Scan Email Results
How to automate daily rootkit and malware scans on Debian/Ubuntu servers using rkhunter and chkrootkit with daily email log reports via cron.
Email Tester - SPF, DKIM, Blacklisting - Do Your Emails Get to the Inbox?
How to test email deliverability, SPF records, DKIM signatures, and spam blacklist status using mail-tester.com to prevent emails hitting spam.
Postfix Queue Monitoring With Mailgraph
How to set up Mailgraph and RRDtool to generate real-time visual mail traffic graphs and queue statistics for Postfix servers on Debian and Ubuntu.
Debugging WordPress: 5 Essential Troubleshooting Steps
First steps for debugging WordPress 5 and Gutenberg editor issues: enabling WP_DEBUG, checking PHP error logs, and isolating theme or plugin conflicts.
League of Professional System Administrators (LOPSA)
Overview of the League of Professional System Administrators (LOPSA), professional development standards, and code of ethics for sysadmins.