What is RVM?
First of all, rvm is a command line tool that can provide a portable multi-version Ruby environment management and switching.
RVM installation
step 1:
curl -SSL https://rvm.io/mpapis.asc | gpg --import -
The above command will download a mpapis.asc file and import it.
Step 2:
curl -SSL https://raw.github.com/wayneesegu