how to ruby on rails on ubuntu 12.04

• update your package repository.

sudo apt-get update

git is a simple, fast and efficient version control system
sudo apt-get install git

Curl is a simple command line utility for getting file over web protocols, based on libcurl.
sudo apt-get install curl


RVM is not strictly required
VM requires the command to be executed as login shell, so open a terminal and go to Edit -> Profile Preferences -> Title and Command and check the box that says “Run Command as a login shell“

download rvm
curl -L get.rvm.io | bash -s stable


http://blog.sudobits.com/2012/05/02/how-to-install-ruby-on-rails-in-ubuntu-12-04-lts