title: How to set default Ruby version with RVM?
body: <p>Ubuntu 11.</p>
  
  <p>I do the following:</p>
  
  <p><code>$ rvm --default use 1.9.2</code>
  and I get:</p>
  
  <p><code>Using /home/md/.rvm/gems/ruby-1.9.2-p180</code>
  so that is good.</p>
  
  <p>but when I now open a new terminal window I still get:</p>
  
  <p><code>$ ruby -v</code></p>
  
  <p><code>ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-linux]</code></p>