active
See which machine is “active” (a machine is considered active if the DOCKER_HOST
environment variable points to it).
$ docker-machine ls NAME ACTIVE DRIVER STATE URL dev - virtualbox Running tcp://192.168.99.103:2376 staging * digitalocean Running tcp://203.0.113.81:2376 $ echo $DOCKER_HOST tcp://203.0.113.81:2376 $ docker-machine active staging
Please login to continue.