[docker] 에러 : Got permission denied while trying to connect to the Docker daemon socket

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/version": dial unix /var/run/docker.sock: connect: permission denied

다음과 같은 에러가 날 경우

sudo chmod 666 /var/run/docker.sock

를 입력해주면, docker version을 확인할 때 클라이언트와 서버의 버전이 잘 출력될것이다.