operator = something on each side that operates on both or either side of the command increment = up/add decrement = down/remove shabang = #!/usr/bin/env

commands = h = help clear = wipe screan ls = show directories cd bin = acces bin directory cd mc = acces mc directory cd www = acces www directory cd = exit all directories to home vi = enter vi mkdir bin = make bin directory pwd = show where you are cmatrix = matrix shell sl = train sl-h = train crossing