docker ps 시 Got permission denied while trying to connect to the Docker 에러

DEV-[occiderepi301:/home/occidere] docker ps -a
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.40/containers/json?all=1: dial unix /var/run/docker.sock: connect: permission denied

sudo chmod 666 /var/run/docker.sock

참고

• https://github.com/occidere/TIL/issues/116