title: How to reference/source a custom .vimrc file
body: <p>Is there a way to reference (or "source") another user's .vimrc file?</p>
  
  <p>When I <code>kuu</code> (a variant of <code>su</code> that uses kerberos security tokens) to an admin user ID, I would like to use my personal <code>.vimrc</code> file.  </p>
  
  <p>I don't want to overwrite the admin's existing <code>.vimrc</code> file because the admin ID is shared by multiple users.</p>