Re: xTerm - How to Learn it? Where to go to find help using it?
 

Have a look at:
http://www.linuxcommand.org/learning_the_shell.php

It's quite complete and will teach you even to make your own scripts!
Good luck.

Re: xTerm - How to Learn it? Where to go to find help using it?
 

Another good general place for learning about Linux is

http://www.linuxbasics.org/