title: Start systemd service after specific service?
body: <p>I have a general question. How does one start a systemd unit <code>*.service</code> after a particular <code>*.service</code> has started successfully?</p>
  
  <p>More specific question is, how do I start <code>website.service</code> only after <code>mongodb.service</code> has started? In other words <code>website.service</code> should depend on <code>mongodb.service</code>.</p>