A collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users, a compact and practical reference.
— Unix Toolboox : http://cb.vu/unixtoolbox.xhtml
Unix Toolbox is also available as a 58 page PDF download at http://cb.vu/unixtoolbox.pdf if you want your own copy. It’s a pretty handy document to have.