Encountered an issue with the script on a fresh debian 8.5 box, this pops up and the rest fails to execute.
![terminal](https://camo.githubusercontent.com/960e4db693243813794532bab048af80f398f9da5df8447276c6cadc0d701921/687474703a2f2f692e696d6775722e636f6d2f744770746568312e706e67)
Manually installing ruby-2.3.3 with rvm worked. A nice improvement to the script would be to add the metasploit-framework directory to the users path to avoid having to navigate inside.