Ubuntu’s shell != bash, and how to fix your scripts

I just found out that on Ubuntu, /bin/sh is a symlink to /bin/dash, not to /bin/bash.  Apparently this was changed to make booting up a little bit faster.

In any case, it might mean that many of your scripts won’t work because they are starting with ‘#!/bin/sh’.  Instead, you should have them point directly to /bin/bash.  Here’s a one line script that will update all the scripts in a directory:

find . -type f | xargs sed -i ‘s_#!/bin/sh_!/bin/bash_’