Answers for "dial unix /var/run/docker.sock: connect: permission denied) (code=500)"

docker dial unix /var/run/docker.sock: connect: permission denied

sudo chmod 666 /var/run/docker.sock

`Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.24/images/create?fromImage=mysql&tag=latest: dial unix /var/run/docker.sock: connect: permission denied

$ sudo usermod -aG docker $USER

`Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.24/images/create?fromImage=mysql&tag=latest: dial unix /var/run/docker.sock: connect: permission denied

$ docker run hello-world