a lot of basic command guide for many OS...interesting to learn about that,coz everything run from basic.
http://rapidshare.com/files/18815161/Commandguide.part1.rar
http://rapidshare.com/files/18815160/Commandguide.part2.rar
http://rapidshare.com/files/18815050/Commandguide.part3.rar
http://rapidshare.com/files/18815046/Commandguide.part6.rar
http://rapidshare.com/files/18815045/Commandguide.part5.rar
http://rapidshare.com/files/18815041/Commandguide.part4.rar
http://rapidshare.com/files/18815010/Commandguide.part7.rar