The Open GPS Tracker is a small device which plugs into a $20 prepaid mobile phone to make a GPS tracker. The Tracker responds to text message commands, detects motion, and sends you its exact position, ready for Google Maps or your mapping software. The Tracker firmware is open source and user-customizable.
Link: Open GPS Tracker
This document is a collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users. This is a practical guide with concise explanations, however the reader is supposed to know what s/he is doing.
Link: Unix Toolbox
The command line. It strikes fear in the hearts of many a new Linux user. They open their terminals reluctantly, and there the prompt sits, with the cursor blinking in rhythm with their racing hearts. What does that blinking cursor want? It’s expecting something… It wants something…
These are the commands we’ve found are most useful to new users. They range from basic navigation to commands that are great for troubleshooting.There are two major navigation commands. There are more, of course, but these two will have you tooling around your computer in no time.
Link: Download Squad
The most complete and updated list of commands on linux – over 350 commands divided into argoments.
Link: Linux Guide