`--user`

  Talk to the service manager of the calling user, rather than the service manager of the system.

`--system`

  Talk to the service manager of the system. This is the implied default.

`-H`
`--host=`

  Execute the operation remotely. Specify a hostname, or a username and hostname separated by `@`, to connect to. The hostname may optionally be suffixed by a port ssh is listening on, separated by `:`, and then a container name, separated by `/`, which connects directly to a specific container on the specified host. This will use SSH to talk to the remote machine manager instance. Container names may be enumerated with `machinectl -H HOST`. Put IPv6 addresses in brackets.

`-M`
`--machine=`

  Execute operation on a local container. Specify a container name to connect to.