Bash script snippets - Sha-bangs

bash_scripting_sha_bangs.sh

#The sha-bang#

# The sha-bang (	#!) [1] at the head of a script tells your system that this file is a set of commands to be fed to the command
# interpreter indicated. The #! is actually a two-byte [2] magic number, a special marker that designates a file type, or in this
# case an executable shell script (type man magic for more details on this fascinating topic). Immediately following the sha-bang
# is a path name. This is the path to the program that interprets the commands in the script, whether it be a shell, a 
# programming language, or a utility. This command interpreter then executes the commands in the script, starting at the top (the
# line following the sha-bang line), and ignoring comments.

#!/bin/sh
#!/bin/bash
#!/usr/bin/perl
#!/usr/bin/tcl
#!/bin/sed -f
#!/bin/awk -f

Explanation from http://tldp.org/LDP/abs/html/sha-bang.html