# /etc/init.d/docker start
[....] Starting docker (via systemctl): docker.serviceJob for docker.service failed.
See "systemctl status docker.service" and "journalctl -xe" for details.
 failed!

# systemctl status docker.service
● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: failed (Result: start-limit-hit) since Sat 2017-11-25 20:04:20 CET; 2min 4s ago
     Docs: https://docs.docker.com
  Process: 12845 ExecStart=/usr/bin/dockerd -H fd:// (code=exited, status=0/SUCCESS)
 Main PID: 12845 (code=exited, status=0/SUCCESS)
      CPU: 326ms

Nov 25 20:04:18 example.com systemd[1]: Started Docker Application Container Engine.
Nov 25 20:04:18 example.com dockerd[12845]: time="2017-11-25T20:04:18.191949863+01:00" level=inf
Nov 25 20:04:19 example.com systemd[1]: Stopping Docker Application Container Engine...
Nov 25 20:04:19 example.com dockerd[12845]: time="2017-11-25T20:04:19.368990531+01:00" level=inf
Nov 25 20:04:19 example.com dockerd[12845]: time="2017-11-25T20:04:19.37953454+01:00" level=info
Nov 25 20:04:20 example.com systemd[1]: Stopped Docker Application Container Engine.
Nov 25 20:04:21 example.com systemd[1]: docker.service: Start request repeated too quickly.
Nov 25 20:04:21 example.com systemd[1]: Failed to start Docker Application Container Engine.
Nov 25 20:04:21 example.com systemd[1]: docker.service: Unit entered failed state.
Nov 25 20:04:21 example.com systemd[1]: docker.service: Failed with result 'start-limit-hit'.