Ubuntu
RVM have dedicated Ubuntu package, so please follow instructions posted here: https://github.com/rvm/ubuntu_rvm
For other Unix systems ( including OSx )
Install RVM (development version):
\curl -sSL https://get.rvm.io | bash
Install RVM stable with ruby:
\curl -sSL https://get.rvm.io | bash -s stable --ruby
Additionally with rails (poor man’s railsinstaller):
\curl -sSL https://get.rvm.io | bash -s stable --rails