If you are frustrated with Ubuntu, try Ubuntu training from Canonical

[Kristian Erik Hermansen]

Rim,

This post is mainly aimed at you.  There is no need to include
profanity in your subject line and regard the project with such
hostility.  If you don't like Ubuntu, you can always use CentOS or
another completely free distro.  However, maybe you aren't familiar
with some of the reasons many of us enjoy Ubuntu.  Did you know that
there are Ubuntu Certifications now?  Why don't you give them a try
and see if you are satisfied with the knowledge you will gain.  Thanks
for trying Ubuntu :-)

http://www.ubuntu.com/training/certificationcourses
https://wiki.ubuntu.com/EngineerCertification

Other topics that may be of interest...
https://wiki.ubuntu.com/EngineerCertification/LPIC1Objectives
-- 
Kristian Erik Hermansen