links to check

http://polishlinux.org/howtos/screen-tips-tricks/ -- screen tricks
http://www.linux.com/feature/116693 -- system optimization
http://www.linux.com/articles/114161 -- cli magic - video on cli
http://amjith.blogspot.com/2007/07/visual-diff-tools-in-linux.html
http://www.pcmag.com/article2/0,1895,2147447,00.asp -- reinvent modern computing
http://www.fsdaily.com/Opposition/Misleading_InformationWeek_GPLv3_article/