Usage: docker-machine help [arg...] Shows a list of commands or help for one command
Usage: docker-machine help subcommand
For example:
$ docker-machine help config Usage: docker-machine config [OPTIONS] [arg...] Print the connection config for machine Description: Argument is a machine name. Options: --swarm Display the Swarm config instead of the Docker daemon
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https://docs.docker.com/machine/reference/help/