Few links that should help you set up Ruby > 1.9 on your OS.
Following guidelines had been tested on:
- Ubuntu 10.04 LTS: http://www.christopherirish.com/2010/08/25/how-to-install-rvm-on-ubuntu-10-04/
- Ubuntu 10.10:
- Ubuntu 11.10: http://rails.vandenabeele.com/blog/2011/11/26/installing-ruby-and-rails-with-rvm-on-ubuntu-11-dot-10/
- Ubuntu 12.04, 12.10 LTS: http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/
- Lion: http://stackoverflow.com/a/8464619
- Mountain Lion: https://coderwall.com/p/auvm9g
- Windows 7: http://www.youtube.com/watch?v=Bnav4Hw7NdY