Linux Programming

Shell Programming

Variables

food=Banana
echo $food
food="Apple"
echo $food
$HOME
$PATH
$0 -- name of the shell script
$# -- number of parameters passed
$$ process ID of the shell script, often used inside a script for generating unique temp filenames
$1, $2, .... -- parameters given to the script
$* -- list of all the parameters, in a single variable
$@ -- subtle variation on $*

Curses

A technique between command line and full GUI.

Example: vi.