title: Installed RVM and tried to switch ruby version but no go
body: <pre><code>mlanza@mlanza-desktop:~$ rvm use 1.9.2
  Using /home/mlanza/.rvm/gems/ruby-1.9.2-p180
  mlanza@mlanza-desktop:~$ ruby -v
  ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]
  </code></pre>
  
  <p>This is on Ubuntu 10.4 where 1.8.7 was already installed.  Does RVM require that all Ruby versions be installed by it?</p>
  
  <p>Do I have to set a PATH variable in my .bashrc?</p>