http://www.web2linux.com/05/installing-rails-3-on-ubuntu-10-04-lucid-lynx/ https://rvm.beginrescueend.com/rvm/install/First, let\u2019s install all of the necessary tools and libraries:apt-get install curl git-core build-essential zlib1g-d…

gksu-propertiesand make sure that the authentication mode is set to sudo.