Below are links to various "quick reference" pages about GNU/Linux software, networking, and such that I use on a regular basis, but not enough to have memorized. Of course, this info is available in other places (such as man pages) with a higher degree of both detail and accuracy, but often at the expense of brevity and sometimes usefulness. Email any comments, complaints, additions, etc to me at jasonandkatienixon [at] yahoo [dot] com.