How to install Jekyll on Ubuntu 9.04 (Jaunty Jackalope)
sudo apt-get install ruby ruby1.8-dev rubygems
sudo gem install rubygems-update
sudo /var/lib/gems/1.8/bin/update_rubygems
Source:
- RudyGems: Updating RubyGems on Ubuntu 9.04
- fooninja.net: How to fix Ruby mkmf (LoadError)