I would like to know if there is any document that can explain how linux files are organized, and what files are for what ?!

where is all my network information saved ?
where are all my startup apps ???

etc etc etc

a document explaining what files are for what purpuse

A good starting point: http://rute.2038bug.com/index.html.gz
And of course: http://www.pathname.com/fhs/

One thing to remember about Unix/Linux, vs. Windows, is that there is no "all-encompassing 'system registry.'" Instead, information is kept in discrete files at well-known locations.

But another thing to bear in mind is that "Unix/Linux" is a very broad range of deployments. It runs on more than 25 wildly different types of computers, from cell-phones to mainframes. There are "secure" and "hardened" systems, ones that are designed to control clusters of machines, and on and on. Per contra, Microsoft Windows runs only on a small handful of system-types, and every one of them is comparatively small. Whereas Windows has "one way to do things," in Unix/Linux: "TMTOWTDI = There's More Than One Way To Do It."

I love Linux, but the only thing that makes me dissy is that amount of files the system carries.

and i dont know what they do ???

where my system info is stored ???

where are all my network settings stored ???

my account info ??? where is it ???

where is the list of all services at startup ???

all those kind of things

It's just a matter of using google and reading the links from eg Tinkster above.
Try this for a fairly clear start http://en.wikipedia.org/wiki/Filesys...archy_Standard and also follow some of the links there, especially the 'See also' section.
If you have specific qns, feel free to ask.

Hi,

Just a few links to aid you;

Linux Documentation Project
Rute Tutorial & Exposition
Linux Command Guide
Utimate Linux Newbie Guide
LinuxSelfHelp
Getting Started with Linux
Advanced Bash-Scripting Guide

These links and others can be found at 'Slackware-Links'. More than just Slackware® links!

thanks everybody