Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/json: dial unix /var/run/docker.sock: connect: permission denied
The error message tells you that your current user can’t access the docker engine, because you’re lacking permissions to access the unix socket to communicate with the engine.
As a temporary solution, you can
Run this command below in your server console:
$ sudo usermod -a -G docker $USER
After doing that, you should be able to run the command without any issues. Run
docker run hello-world as a normal user in order to check if it works. Reboot if the issue still persists.
Logging out and logging back in is required because the group change will not have an effect unless your session is closed.