title: rabbitmq-server doesn't start (status=64)
body: <p>Running sudo service rabbitmq-server start results in the following output:</p>
  
  <p>Job for rabbitmq-server.service failed because the control process exited with error code.
  See "systemctl status rabbitmq-server.service" and "journalctl -xe" for details.</p>
  
  <p>systemctl status output for rabbitmq-server.service is as follows:</p>
  
  <p>● rabbitmq-server.service - RabbitMQ broker<br>
  Loaded: loaded (/lib/systemd/system/rabbitmq-server.service; enabled; vendor preset: enabled)<br>
  Active: activating (auto-restart) (Result: exit-code) since Wed 2019-01-30 13:45:25 +08; 4s ago<br>
    Process: 32710 ExecStop=/usr/lib/rabbitmq/bin/rabbitmqctl shutdown (code=exited, status=69)<br>
    Process: 6836 ExecStart=/usr/lib/rabbitmq/bin/rabbitmq-server (code=exited, status=64)<br>
  Main PID: 6836 (code=exited, status=64)</p>
  
  <p>Jan 30 13:45:25 ip-172-31-1-92 systemd[1]: rabbitmq-server.service: Main process exited, code=exited, status=64/n/a</p>
  
  <p>Jan 30 13:45:25 ip-172-31-1-92 systemd[1]: rabbitmq-server.service: Failed with result 'exit-code'.</p>
  
  <p>Jan 30 13:45:25 ip-172-31-1-92 systemd[1]: Failed to start RabbitMQ broker.</p>