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==Reference Material==
*there is a LOT of reference material available on the internet
*a huge amount of Linux documentation has been collected at: [http://en.tldp.org en.tldp.org]*if you prefer a book, a good reference is "''' ''A Practical Guide to Linux Commands, Editors and Shell Programming" '' ''' by Mark Sobell*a huge amount of Linux documentation has been collected at en{||[[Image:Practical-linux-1.jpg|thumb|right|160px|]]|[[Image:Practical-linux-2.jpg|thumb|right|160px|]]|[[Image:Practical-linux-3.tldpjpg|thumb|right|160px|]]|[[Image:Practical-linux-4.orgjpg|thumb|right|160px|]]|}
=Introduction to UNIX=
***Shell (user interface, command interpreter, and some built-in commands), surrounded by
****Utilities (or commands)
*most common shells: Bourne shell ('''sh'''), C shell ('''csh'''), Korn shell ('''ksh'''), Bourne again shell ('''bash'''), TC shell ('''tcsh'''), Z shell ('''zsh''')
*we'll mostly be concerned with the Bash shell, which is the most popular Linux shell
*the Korn shell is the most popular Unix shell, and is very similar to the Bash shell
