title: What's the difference between the commands 'sudo gearmand -d' and 'sudo service gearman-job-server start'?
body: <p>I'm learning gearman and found that there are two ways to start the gearman:</p>
  
  <ul>
  <li><p>sudo gearmand -d</p></li>
  <li><p>sudo service gearman-job-server start</p></li>
  </ul>
  
  <p>What's the difference?</p>
  
  <p>When to use each of them?</p>
  
  <p>Thanks for any feedback!</p>