While going through the manual of openssl, I thought it would be a good exercise to understand the signature verification process for educational purposes. As a fruit to my labor, I would also develop a simple script to automate the process.
Having been a heavy VirtualBox user while under Linux, I once came across this useful interactive script that I could run in my drop-down terminal that would easily allow me to manage my VMs. So useful was it, that it was aliased on all workstations i used, and carried around in my dropbox account. Here is a screenshot of it in action: