title: Failed to start Docker Service.( Ubuntu 16.04 LTS)
body: <p>Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.</p>
  
  <p><strong>systemctl status docker.service:</strong></p>
  
  <pre><code>● docker.service - Docker Application Container Engine
     Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
     Active: inactive (dead) (Result: exit-code) since Fri 2018-04-20 00:30:30 IST; 22s ago
       Docs: https://docs.docker.com
    Process: 16941 ExecStart=/usr/bin/dockerd -H fd:// (code=exited, status=1/FAILURE)
   Main PID: 16941 (code=exited, status=1/FAILURE)
  
  Apr 20 00:30:30 cookie2 systemd[1]: Failed to start Docker Application Container Engine.
  Apr 20 00:30:30 cookie2 systemd[1]: docker.service: Unit entered failed state.
  Apr 20 00:30:30 cookie2 systemd[1]: docker.service: Failed with result 'exit-code'.
  Apr 20 00:30:30 cookie2 systemd[1]: docker.service: Service hold-off time over, scheduling restart.
  Apr 20 00:30:30 cookie2 systemd[1]: Stopped Docker Application Container Engine.
  Apr 20 00:30:30 cookie2 systemd[1]: docker.service: Start request repeated too quickly.
  Apr 20 00:30:30 cookie2 systemd[1]: Failed to start Docker Application Container Engine.
  </code></pre>