title: How do I associate a new rvm install with existing ruby versions?
body: <p>I was having a problem with RVM, so I uninstalled and re-installed it.</p>
  
  <p>The truth is I actually tried rbenv, but that didn't work out for me so I am trying to get rvm up and running again - without having to install duplicate versions of Ruby.</p>
  
  <p>I have at least 1 existing version of Ruby installed:</p>
  
  <pre><code>ruby --version
  ruby 1.8.7 (2011-12-28 patchlevel 357) [universal-darwin11.0]
  </code></pre>
  
  <p>But when I do <code>rvm list</code> I get a blank list:</p>
  
  <pre><code>bash-3.2$ rvm list
  
  rvm rubies
  
  
  # Default ruby not set. Try 'rvm alias create default &lt;ruby&gt;'.
  
  # =&gt; - current
  # =* - current &amp;&amp; default
  #  * - default
  </code></pre>
  
  <p>So my question has two parts:</p>
  
  <ul>
  <li>How do I see all the versions of Ruby on my system (given that rvm is not showing me any)?</li>
  <li>How do I associate the new RVM install with the existing versions of Ruby?</li>
  </ul>
  
  <p>Or am I better off removing all existing versions of Ruby and re-installing everything? That seems like a pain in the ass though.</p>