Unix Toolbox
A collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users, a compact and practical reference.
Basics | Cheat sheets | Linux Command Library
Handy cheat sheets with linux tips and terminal basics about System control, Users, Files, Package managers, Video and Audio, Hacking tools, Terminal games and many more categories.
Linux Commands - A practical reference
A linux command line cheat sheet