The computer science portal csdir.org has published another good tutorial. This one is about hacking and tells us what an exploit is, how to compile one and how to use it. This hacking tutorial is of great use for newbies and avarage users. This site also has a couple of other great tutorials;

The bash tutorial which is a complete guide of how to use bash to script useful scripts. This tutorial is probably the best in the area.
It can be found here: http://csdir.org/tutorials/bash-tutorial/

The third tutorial they offer is the Ansi C tutorial which is a great starting tutorial for programmers that want to know more about the C programming language. The ANSI part is just meaning the American National Standards Institute.

We on cdsrc really recommend those three tutorials.