Ok so you are looking for articles here, why?
lol
No seriously they have what your looking for but depends what you are using it for. Hacking, Cracking, or are just a system admin looking for more information.

I'll be honest I didn't start reading text files here but places like. Hack3r.com, astalavista.com, happyhacker.org, blackcode.com, inforsyssec.org, those places you really learn alot, also Ankita Fadia's hacking truth site gave me alot of insight.

.http://hackingtruths.box.sk/
Also blacksun tutorials
http://blacksun.box.sk/tutorials.htm

Most of what you won't learn you will be able to learn from the books that we suggested.

I use this place more as a reference to ask questions so I can understand things better.Also to help other people.