Sebastos take a look at:

http://www.antionline.com/showthread...hreadid=133164

and

http://www.antionline.com/showthread...hreadid=133107

and

http://www.linux.org

after reading that...
grew up, go to a bookshop and buy:

Hacking Exposed: Network Security Secrets & Solutions, Third Edition by Stuart McClure, Joel Scambray, and George Kurtz ISBN: 0-07-219381-6