1. Install JRuby and Rails Download JRuby from http://dist.codehaus.org/jruby/ $ wget http://dist.codehaus.org/jruby/jruby-bin-1.0.1.zip Unzip JRuby to your favorite directory (e.g. /usr/local). $ cd /usr/local $ sudo unzip ~/jruby-bin-1.0.1.zip Set environment variable JRUBY_HOME to point JRuby directory. $ export JRUBY_HOME=/usr/local/jruby-1.0.1 $ export PATH=$PATH:$JRUBY_HOME/bin Install