title: How to check if Varnish cache is working correctly?
body: <p>I'm using Varnish Cache on a Wordpress website that runs on Nginx. It's configured the way mentioned in <a href="http://theartofcode.tv/installing-wordpress-on-ec2/">this blog</a>. It's working, but I'm not sure if it's actually serving content from the cache.</p>
  
  <p>How to know for sure? Can someone please guide me. I'm new to Varnish cache. </p>