[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