All the Best Linux Cheat Sheets

1. Linux Command Line

• Linux Reference Card - Great reference published on FOSSwire website
• One page Linux Manual - Great one page reference to the most popular Linux commands
• Unix Tool Box - An incredibly exhaustive reference for all things Linux.
• Treebeard’s Unix Cheat Sheet - A great reference with Dos comparisons
• Terminal Shortcuts - Cheat sheet for the most common terminal shortcuts
• More Terminal Shortcuts - More shortcuts for history and X

2. Linux Security

• Linux Security Quick Reference Guide - An awesome security checklist reference
• IP Tables - If you are interested in Linux firewalls this is a must have
• TCPDump - Great cheat sheet to an awesome security tool
• Wireshark Filters - An awesome list of filters for the best packet sniffing utility
• IP Access Lists - Cheat sheet for IP Access Lists
• Common Ports - In case you don’t have all common ports memorized
• netcat - Reference to the swiss army knife of networking

3. Linux Administration

• Linux Admin Quick Reference - PDF cheat sheet of common Linux administration tasks
• Crontab Reference - Also see Learning Cron by Example

4. Gnome/KDE

• Useful Gnome/KDE shortcuts
• KDE Cheat Sheet - KDE specific cheat sheet

5. sed/awk/vim and other tools

• Vi Cheat Sheet - Who doesn’t love Vi/Vim. Also check out my guest post on Vim.
• Concise Vim Cheat Sheet
• awk nawk and gawk cheat sheet - Awesome awk sheet, also check out awk is a beautiful tool
• Sed Stream Editor Cheat Sheet - Savvy Sed
• Screen Quick Reference - Quick reference to a must have screen emulator, Also check out Introduction to GNU Screen
• Screen Terminal Emulator Cheat Sheet - PDF cheat sheet for screen
• Vi/Vim Cheat Sheet - Nice vim/vi keyboard layout reference

6. Distro Specific

• Ubuntu Cheat Sheet - Ubuntu specific cheat sheet
• Debian Cheat Sheet - Debian specific cheat sheet

7. Everything Else

• Online Man Pages - The ultimate cheat sheet repository. Also use the ‘man’ command.