title: How do I uninstall ruby and gems using RVM?
body: <p>I'm just learning to use RVM, and would like to know how I can do the following:</p>
  
  <ol>
  <li>Remove a specific version of Ruby and/or all versions of Ruby.</li>
  <li>Verify the removal that version, both using RVM and simply looking into my directories, config files, etc (where should I look?)</li>
  <li>Installing a specific version of Ruby.</li>
  </ol>
  
  <p>Also, how would I do the above with gems?</p>
  
  <p>Thanks in advance for your help.</p>