systemctl

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled)
   Active: failed (Result: start-limit) since Sat 2017-09-09 20:13:26 EDT; 15s ago
     Docs: https://docs.docker.com
  Process: 7985 ExecStart=/usr/bin/dockerd -H fd:// (code=exited, status=1/FAILURE)
 Main PID: 7985 (code=exited, status=1/FAILURE)

Sep 09 20:13:26 server systemd[1]: Failed to start Docker Application Container Engine.
Sep 09 20:13:26 server systemd[1]: Unit docker.service entered failed state.
Sep 09 20:13:26 server systemd[1]: docker.service holdoff time over, scheduling restart.
Sep 09 20:13:26 server systemd[1]: Stopping Docker Application Container Engine...
Sep 09 20:13:26 server systemd[1]: Starting Docker Application Container Engine...
Sep 09 20:13:26 server systemd[1]: docker.service start request repeated too quickly, refusing to start.
Sep 09 20:13:26 server systemd[1]: Failed to start Docker Application Container Engine.
Sep 09 20:13:26 server systemd[1]: Unit docker.service entered failed state.