Auto Update Drupal Multisite

I was recently talking with the fine folks at UCSF.edu and they mentioned that they do updates of giant Drupal multisites.  I asked them how they manage that.  The answer: a script!  So of course I wanted one too.

Here are my steps:

1. Create a bash script in your home directory (or somewhere outside your web root)
2. Make the script executable: sudo chmod +x myscript
3. Put the following code inside your script: https://gist.github.com/koppieesq/2ccb8b562e56ae8dad767db9812a25bf