title: How to Close Xvfb after usage
body: <p>I am running some tests in headless firefox using Xvfb. However, after my tests are finished I want to move back to normal display. But I am not able to do that .Here is What I am doing .</p>
  
  <ol>
  <li>Open A Terminal</li>
  <li>sudo Xvfb :10 -ac &amp;</li>
  <li>export DISPLAY=:10</li>
  <li>Execute My Tests using RobotFramework+ Selenium</li>
  </ol>
  
  <p>After step 4, I want to open the firefox in the same terminal but I am not able to see it as it is directed towards :10 display.</p>
  
  <p>I wonder how can I shut this (xvfb :10) down so that  I can open firefox and view it. </p>