Tricks
Running on another machine
Run docker daemon on one machine
/usr/bin/dockerd -H tcp://0.0.0.0:2375
To access docker in any machine, use
export DOCKER_HOST=ip_address:2375
docker ps
-->
/usr/bin/dockerd -H tcp://0.0.0.0:2375
export DOCKER_HOST=ip_address:2375
docker ps