码头工人机器帮助

Usage: docker-machine help [arg...]

Shows a list of commands or help for one command

用法：docker-machine help子命令

例如：

$ 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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