Hi there! I've decided to learn Linux OS, mainly to administrate and to program in C. I've found gcc a great alternative to the highly priced borland/microsoft products. First thing which I did, I bought a Linux Bible 2009 edition. Unfortunately, I've found it absolutely useless. It doesn't explain about file structures, how the system works, etc. Everything is written for a complete dummie. In addition, author assumes that somebody had already installed a system for you. Nevertheless, I've managed to install Ubuntu simply by following instructions on the screen. Now I'm struggling to sell that "Bible" and I don't really want to spend more money on books. There is all sorts of help available online, but it is not structured in a way I'd like it to be (or maybe I didn't find it yet). However, there is one online book which I particularly liked, but it is a bit outdated:
[ http://rute.2038bug.com/index.html.gz ].

I would appreciate if somebody would share something similar, up to date!

Before posting this thread I've done my little research. For somebody who is looking for some help in a particular aspect of using OS, here are some links which I've found useful.

[The Linux Documentation Project]
http://www.tldp.org/guides.html
http://tldp.org/LDP/Bash-Beginners-G...tml/index.html

http://www.linuxselfhelp.com/

http://linuxmanpages.com/

http://www.unixguide.net/linux/linuxshortcuts.shtml

[Bash reference guide]
http://www.gnu.org/software/bash/manual/bashref.html

http://lnag.sourceforge.net/
[seems like good info, but not finished yet]

Thank you!

Here is a good resource for free books to download: http://www.lslnet.com/linux/Free-Computer-Books.htm

FTA - Free Technology Academy - http://ftacademy.org/
The Quick Reference Site - The best resource for free Quick Reference Cards
http://www.digilife.be/quickreferences/Home.html
Unix Toolbox - http://cb.vu/unixtoolbox.xhtml