An Introduction to the Command-Line (on Unix-like systems)   Everybody Knows How to Use a Computer, but Not Everyone Knows How to Use the Command Line. Yet This is the Gateway to Doing Anything and Everything Sophisticated with a Computer and the Most Natural Starting Place to Learn Programming
100 Useful Command-Line Utilities   A Guide to 100 (ish) Useful Commands on Unix-like systems
Setting Up Nginx, uWSGI, and Django on Amazon's EC2   A Supplement to the Official uWSGI Tutorial for Novices that Holds Your Hand and Whispers Soothing Words
Wiki: Git   Basic Git Commands Reference
Wiki: Vim   Basic Vim Commands Reference
Wiki: SGE   Sun Grid Engine (SGE) Reference
Mac Tips   Tips, Tricks, and Miscellany for Macintosh Computing
Notes: Django   Misc Django Notes