docker-docs/machine/reference/config.md

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Show client configuration	machine, config, subcommand	docker-machine config	true

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

For example:

$ docker-machine config dev \
--tlsverify \
--tlscacert="/Users/ehazlett/.docker/machines/dev/ca.pem" \
--tlscert="/Users/ehazlett/.docker/machines/dev/cert.pem" \
--tlskey="/Users/ehazlett/.docker/machines/dev/key.pem" \
-H tcp://192.168.99.103:2376