title: Starting Nginx gives org.freedesktop.PolicyKit1 error
body: <p>I just started to build a ubuntu server on DigitalOcean. When I start the nginx service, it gives the following error:</p>
  
  <pre><code>/etc/nginx/sites-enabled$ service nginx start
  Failed to start nginx.service: The name org.freedesktop.PolicyKit1 was not provided by any .service files
  </code></pre>
  
  <p>I have never seen this before and searching on google seemed the solutions were not quite straightforward.</p>