Upgrade ruby language to a newer version: http://stackoverflow.com/questions/4574318/how-do-i-upgrade-my-ruby-1-9-2-p0-to-the-latest-patch-level-using-rvm
Upgrade ruby language to a newer version: http://stackoverflow.com/questions/4574318/how-do-i-upgrade-my-ruby-1-9-2-p0-to-the-latest-patch-level-using-rvm