Reference

Cheat sheets for quick recall

Short, practical references for learners and junior support engineers. Keep them open while practising or troubleshooting.

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Reference library

Each cheat sheet favours useful examples and cautious notes over endless command flags.

Cheat sheet

Linux Commands Cheat Sheet

Navigation, files, permissions, processes, logs, services, storage and networking commands.

LinuxCommandsReference Cheat sheet

Bash Scripting Cheat Sheet

Variables, arguments, tests, loops, functions, traps and safe script patterns.

BashScriptsAutomation Cheat sheet

DNS Records Cheat Sheet

A, AAAA, CNAME, MX, TXT, SPF, DKIM, DMARC, NS and TTL explained quickly.

DNSRecordsEmail Cheat sheet

Git Commands Cheat Sheet

Clone, branch, status, diff, commit, log, merge, rebase, stash and recovery basics.

GitVersion controlReference Cheat sheet

SSH Cheat Sheet

Connections, keys, config, known_hosts, tunnels, file copies and safety checks.

SSHKeysLinux Cheat sheet

Hosting Support Checklist

A first-response checklist for DNS, website, email, SSL, disk, database and WordPress tickets.

SupportHostingChecklist