user-system-options

--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, optionally prefixed by a user name to connect as and a separating @ character. If the special string .host is used in place of the container name, a connection to the local system is made (which is useful to connect to a specific user's user bus: --user --machine=lennart@.host). If the @ syntax is not used, the connection is made as root user. If the @ syntax is used either the left hand side or the right hand side may be omitted (but not both) in which case the local user name and .host are implied.

-C; --capsule=
Execute operation on a capsule. Specify a capsule name to connect to. See capsule@.service(5) for details about capsules.