This 3rd edition updates some of the recent progress with Linux OS, including a review of the STEAM(R) OS allowing users to skip Windows gaming & play over 10, 000 STEAM(R) games with Linux. It also includes a summary of useful Linux commands, basic instructions for initial use of the most common Linux editors, and the very important methods for setting up Linux as a LIVE-OS, to easily run and test on an existing Windows(R) computer.