Recipe: Playing with variables and environment variables

Environment variables
=====================
$ echo $PATH
/home/slynux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

$ export PATH="$PATH:/newpath/"
$ echo $PATH
/home/slynux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/newpath/

Length of string
================
$ var="hello"
$ echo ${#var}
5

Current shell
=============
$ echo $SHELL
/bin/bash

$ echo $0
bash


Scripts
=======
variables.sh
superuser.sh