Ruby-Gems

This makes the gem command work:

sudo apt-get install rubygems1.8

But more is needed...

sudo apt-get install curl ruby

We already have Git installed; if you don't you may want to throw a git-core in there. (And if you already have curl installed, you can leave it out of the apt-get command-- or put it in, it will work either way.

Update: See Installing Drubuntu

Use the following commands to set up a development environment on Ubuntu (8.10).