Here's a list of interesting things in the Linux World

The complete Debian reference, it’s a good starting point to get started with Linux, i’ve just stumbled upon it a few days ago:

http://www.debian.org/doc/manuals/debian-reference

Debian documentation:

http://www.debian.org/doc/

Another good Survival Guide for Linux:

http://www.togaware.com/linux/survivor/

Good reference to bash scripting:

http://gd.tuwien.ac.at/linuxcommand.org/lts0040.php

http://www.tldp.org/LDP/abs/html/

Linux Command website is a good starting point, this is a video about "how linux is made":

http://lcorg.blogspot.com/2012/04/how-linux-is-made.html

Debian web server tools:

http://www.debianhelp.co.uk/webserver.htm

Creating your own custom kernel:

http://newbiedoc.sourceforge.net/system/kernel-pkg.html