title: Short-urls without index files?
body: <p>I'm wondering how urls like these are generated: <code>http://www.example.com/Xj7hF</code></p>
  
  <p>This is a practice I have seen used by many url shorteners as well as other websites that supposedly don't want to display data in the url in a parameter format.</p>
  
  <p>Surely they can't be placing index files in the folder destination <code>/Xj7hF</code> etc with a redirect to the actual url, so I'm wondering how this is done.</p>
  
  <p>Any help would be very appreciated!</p>
  
  <p>(I'm running on a Linux server with Apache).</p>