MRI – Matz’s Ruby Interpreter

1. We need curl on a fresh install if it so happens that it is not present:

sudo apt-get update
sudo apt-get install curl

2. Download and run the RVM installation script

2.1 Installing the stable release version:

user$: curl -sSL https://get.rvm.io | bash -s stable

2.2 To get the latest development state:

user$: curl -sSL https://get.rvm.io | bash

3. Reopen terminal and run:

rvm install ruby-2.1.0

or paste this in the current terminal and then install ruby: source ~/.rvm/scripts/rvm

4. If you’re getting the “RVM is not a function” message you need to enable login shell (optional):

With the the terminal window open go to:

Terminal > Edit > Profile Preferences > Title and Command > Run command as a login shell (make sure this check-box is enabled)