[Solved] Can’t hook up with the Docker daemon at unix:/var/run/docker.sock. Is the docker daemon operating?

When you get the next error when attempting to run a Docker container:

Can't hook up with the Docker daemon at unix:/var/run/docker.sock. Is the docker daemon operating?

Then you possibly can resolve it by operating the next:

systemctl begin docker

If this doesn’t work due to a root consumer situation, then you are able to do the next first:

gpasswd -a $USER docker

Further points?

Subject 1

When you have tried the above, and get this error:

Failed to begin docker.service: Unit docker.service is masked.

Then you possibly can resolve it as follows:

systemctl unmask docker.service
systemctl unmask docker.socket
systemctl begin docker.service

Subject 2

You may nonetheless can’t get round this, then attempt to use the docker daemon service itself:

sudo dockerd