I was forewarned. Rubygems does require a slight bit of configuration on Ubuntu, it seems. That is, it worked fine once installed… but installed gems were not on the default path.
Resolving this is fairly simple; create or edit .bashrc like so:
export PATH=$PATH:/var/lib/gems/1.8/bin
Ok, you’re done. Leave your shell and log back in, or source /etc/profile.
