When running script/server, I was getting the error message

<pre> Rails requires RubyGems >= . Please install RubyGems and try again: http://rubygems.rubyforge.org</pre> <ul> <li>Ruby Enterprise Edition in /opt/ruby-enterprise/bin</li> <li>Ubuntu’s default ruby</li> </ul> <pre> apt-get remove ruby</pre>fixed the problem</code>