##OSX Command Line ####Also known as a UNIX terminal Can be found in /Applications/Terminal or /Applications/Utilities/Terminal
The extreme basics are:
To change directory for example: cd Documents: cd filename
To go up a directory: cd ..
To go to your home directory the command cd with nothing after it: cd
To list files in the current directory: ls
To list files as list: ls -l
To list all files as list: ls -al
To find out what directory you're in: pwd
####References Basic Unix