If your distribution / installation method hasn't already provided it, the package-manager, ruby-gems, may need installing separately on top of Ruby.
To all intents and purposes, it's just another ruby module like ODBC earlier, so installation is easy:
- download the latest from rubyforge
- run `ruby setup.rb'
- you'll probably have to be root to do this.
That's it! Hopefully you should now have a `gem' command in your PATH. You can test with:
zsh, pizza 12:26PM ruby/ % gem --version 1.1.0