systemctl edit docker

[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H unix:///var/run/docker.sock -H tcp://192.168.2.11:2375

systemctl restart docker

-- Unit docker.service has finished shutting down.
Nov 15 09:45:35 docker systemd[1]: Starting Docker Application Container Engine...
-- Subject: Unit docker.service has begun start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit docker.service has begun starting up.
Nov 15 09:45:35 docker dockerd[27753]: Failed to load listeners: can't create unix socket /var/run/docker.sock: is a directory
Nov 15 09:45:35 docker systemd[1]: docker.service: Main process exited, code=exited, status=1/FAILURE
Nov 15 09:45:35 docker systemd[1]: docker.service: Failed with result 'exit-code'.
Nov 15 09:45:35 docker systemd[1]: Failed to start Docker Application Container Engine.
-- Subject: Unit docker.service has failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit docker.service has failed.
--
-- The result is RESULT.

sudo su

ls -la /var/run/docker.sock

rm -fr /var/run/docker.sock

systemctl edit docker

ls -la /var/run/docker.sock
srw-rw---- 1 root docker 0 Nov 15 09:47 /var/run/docker.sock