loginctl — Control the systemd login manager
loginctl [OPTIONS...]  {COMMAND}  [NAME...] 
loginctl may be used to introspect and control the state of the systemd(1) login manager systemd-logind.service(8).
The following options are understood:
-h, --help¶Prints a short help text and exits.
--version¶Prints a short version string and exits.
-p, --property=¶When showing
                                session/user properties, limit
                                display to certain properties as
                                specified as argument. If not
                                specified all set properties are
                                shown. The argument should be a
                                property name, such as
                                Sessions. If
                                specified more than once all
                                properties with the specified names
                                are shown.
-a, --all¶When showing unit/job/manager properties, show all properties regardless whether they are set or not.
--full¶Do not ellipsize cgroup members.
--no-pager¶Do not pipe output into a pager.
--no-ask-password¶Don't query the user for authentication for privileged operations.
--kill-who=¶When used with
                                kill-session,
                                choose which processes to kill. Must
                                be one of leader, or
                                all to select whether
                                to kill only the leader process of the
                                session or all processes of the
                                session. If omitted defaults to
                                all.
-s, --signal=¶When used with
                                kill-session or
                                kill-user, choose
                                which signal to send to selected
                                processes. Must be one of the well
                                known signal specifiers such as
                                SIGTERM, SIGINT or SIGSTOP. If omitted
                                defaults to
                                SIGTERM.
-H, --host¶Execute operation remotely. Specify a hostname, or username and hostname separated by @, to connect to. This will use SSH to talk to the remote login manager instance.
-P, --privileged¶Acquire privileges via PolicyKit before executing the operation.
The following commands are understood:
List current sessions.
Show terse runtime status information about one or more sessions. This function is intended to generate human-readable output. If you are looking for computer-parsable output, use show-session instead.
Show properties of one
                                or more sessions or the manager
                                itself. If no argument is specified
                                properties of the manager will be
                                shown. If a session ID is specified
                                properties of the session is shown. By
                                default, empty properties are
                                suppressed. Use --all
                                to show those too. To select specific
                                properties to show use
                                --property=. This
                                command is intended to be used
                                whenever computer-parsable output is
                                required. Use
                                session-status if
                                you are looking for formatted
                                human-readable
                                output.
Activate one or more sessions. This brings one or more sessions into the foreground, if another session is currently in the foreground on the respective seat.
Activates/deactivates the screen lock on one or more sessions, if the session supports it.
Activates/deactivates the screen lock on all current sessions supporting it.
Terminates a session. This kills all processes of the session and deallocates all resources attached to the session.
Send a signal to one
                                or more processes of the session. Use
                                --kill-who= to select
                                which process to kill. Use
                                --signal= to select
                                the signal to send.
List currently logged in users.
Show terse runtime status information about one or more logged in users. This function is intended to generate human-readable output. If you are looking for computer-parsable output, use show-user instead. Users may be specified by their usernames or numeric user IDs.
Show properties of one
                                or more users or the manager
                                itself. If no argument is specified
                                properties of the manager will be
                                shown. If a user is specified
                                properties of the user is shown. By
                                default, empty properties are
                                suppressed. Use --all
                                to show those too. To select specific
                                properties to show use
                                --property=. This
                                command is intended to be used
                                whenever computer-parsable output is
                                required. Use
                                user-status if
                                you are looking for formatted
                                human-readable
                                output.
Enable/disable user lingering for one or more users. If enabled for a specific user a user manager is spawned for him/her at boot, and kept around after logouts. This allows users who aren't logged in to run long-running services.
Terminates all sessions of a user. This kills all processes of all sessions of the user and deallocates all runtime resources attached to the user.
Send a signal to all
                                processes of a user. Use
                                --signal= to select
                                the signal to send.
List currently available seats on the local system.
Show terse runtime status information about one or more seats. This function is intended to generate human-readable output. If you are looking for computer-parsable output, use show-seat instead.
Show properties of one
                                or more seats or the manager
                                itself. If no argument is specified
                                properties of the manager will be
                                shown. If a seat is specified
                                properties of the seat are shown. By
                                default, empty properties are
                                suppressed. Use --all
                                to show those too. To select specific
                                properties to show use
                                --property=. This
                                command is intended to be used
                                whenever computer-parsable output is
                                required. Use
                                seat-status if you
                                are looking for formatted
                                human-readable
                                output.
Persistently attach
                                one or more devices to a seat. The
                                devices should be specified via device
                                paths in the /sys
                                file system. To create a new seat
                                attach at least one graphics card to a
                                previously unused seat name. Seat
                                names may consist only of a-z, A-Z,
                                0-9, "-" and "_" and must be prefixed
                                with "seat". To drop assignment of a
                                device to a specific seat just
                                reassign it to a different seat, or
                                use
                                flush-devices.
Removes all device assignments previously created with attach. After this call only automatically generated seats will remain and all seat hardware is assigned to them.
Terminates all sessions on a seat. This kills all processes of all sessions on a seat and deallocates all runtime resources attached to them.