Playing with AI Image Generation
Experiments with AI image generation using Midjourney, DALL-E, and Stable Diffusion, testing prompt engineering and photorealistic rendering.
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.
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.
7 Fun and Useless Linux Terminal Utilities to Play With
A fun collection of classic terminal toys and ASCII animations: Asciiquarium, Steam Locomotive (sl), burning fire (aafire), and Star Wars via telnet.
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.
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.
Rebuild cPanel Roundcube Database
How to fix corrupted SQLite or MySQL Roundcube webmail databases on cPanel servers using the convert_roundcube_mysql2sqlite and rebuild scripts.
Bash One-Liners: Flip a Coin and Generate Random Passwords with /dev/urandom
Two handy Linux shell one-liners using /dev/urandom: true entropy coin flipping and generating clean random passwords directly from the CLI.
Accessing WHM without the root password
How to log into cPanel Web Host Manager without a root password by generating a temporary user session URL via the whmapi1 command line tool in SSH.
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.
Enabling SPF and DKIM for all domains (WHM / cPanel Server)
A quick SSH command to enable SPF and DKIM DNS records across all hosted cPanel accounts on a WHM server using the enable_dkim_spf script.
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.
Find all error_logs on a server
A useful Linux find command to locate, sort, and inspect all error_log files across a server to troubleshoot PHP errors and disk usage.