UNIX for Dummies Questions & Answers

For eg:

#!/usr/bin/ksh

<remaining code goes here>
..
..


Does the compiler ignores that?

Thanks

The "shebang" line (as it is known) is a clear statement about which program you want to interpret the following lines. It is actioned by the shell even though it appears to be a comment line. The shebang line could be a shell, awk, perl or whatever. It must be the first line of the script.

The shebang line is optional and if not present your script will be interpreted by the default shell for your environment. This can create anomalies if you have a script which is common to more than one enviroment (e.g. user and cron).

It is good working practice to have the shebang line.

It's no comment, it's the shebang, telling the system what interpreter to run this script with (ksh/bash/csh/perl/python/ruby/...)