How To Install Ruby on Rails on Ubuntu 12.04 LTS with RVM

1. install ruby with rvm

- make an update

sudo apt-get update

- install curl if you do not have

sudo apt-get install curl

- install rvm with curl

\curl -L https://get.rvm.io | bash -s stable
source ~/.rvm/scripts/rvm

- install rvm requirements as well

rvm requirements

2. install ruby

- install

rvm install ruby

- tell to use recently installed version

rvm use ruby --default

3. install rubygems

rvm rubygems current

4. install rails

gem install rails

5. finished

you are instal ruby on rails. you can now use rails command for e.g.

rails new testproject




source: https://www.digitalocean.com/community/articles/how-to-install-ruby-on-rails-on-ubuntu-12-04-lts-precise-pangolin-with-rvm