I don't trust "get random text over the net and pipe into bash" installation methods, so I walked through it and it seems benign and straightforward.
This is the script that gets downloaded to ~/.vocab:
.. and the rest of the script just appends an exec of ~/.vocab to your shell's login config.
If you just want to dork around with the sudocabulary script, you can do this:
You can either follow the instructions in the github README or add sudocabulary.sh to your .bashrc yourself.
