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
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
7. Everything Else
- Online Man Pages – The ultimate cheat sheet repository. Also use the ‘man‘ command.
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