Unable to reload docker daemon with -H fd:// option

I’m trying to supply the parameter “-H fd://” to the /usr/lib/systemd/system/docker.service ExecStart docker daemon options. When I try to restart Docker daemon, it fails to start up.

Could any one help?

What is all the output of the docker daemon when it attempts to start up? (it’ll be in journald)

Can you include the contents of both your docker.socket and docker.service files?