title: Airflow Scheduler shutting down
body: <p>I am running a <strong>Airflow</strong> (v2.3.3) cluster on on-premise virtual machines and starting the Airflow <strong>scheduler, webserver, and workers</strong> through <strong>SSH</strong>. However, after some time of leaving the SSH session, the Airflow scheduler unexpectedly <strong>shut down</strong>. I have two following questions:</p>
  <ol>
  <li>Why does an Airflow scheduler shut down?</li>
  <li>How do I make sure that Airflow processes (including the scheduler) are running despite leaving the SSH session?</li>
  </ol>