Shutdown protection.

EDIT: Thanks everyone! molly-guard is exactly what I needed!

EDIT2: Accidentally deleted the original question. :x It was along the lines of "How can I keep myself from accidentally shutting down my EC2 server?" molly-guard is the solution that I chose, since I SSH into my EC2 instance. It checks whether you're connected in via SSH/tty before executing the shutdown command and requires that you type the host name of the remote machine in order to do so.