There are few basic principals under UNIX and Linux. Any MCSE must understand and follow them.
a) Everything is a file – Including your hardware.
b) All server / desktop configuration stored in text files – /etc, /usr/local/etc and ~/.dot-files. So learn to edit and search text files. Learn basis of grep, awk and sed along with vi. Same way all errors are logged in a text file located at /var/log/ directory
c) One small utility performs one single task at a time – Typical Linux box may have 2000-4000 command installed. Each command provides a single functionality.
d) Linux / UNIX is designed for simplicity – Add complexity only where you must.
e) Filters – Ability to chain programs together to perform complex tasks.
g) Interactive commands and dialog boxes are rare in UNIX / Linux – Learn to use commands, command line arguments and man pages.
Let the flame war begun ;)