LOGINCTL
LOGINCTL
NAMESYNOPSIS
DESCRIPTION
OPTIONS
EXIT STATUS
ENVIRONMENT
SEE ALSO
NAME
loginctl − Control the systemd login manager
SYNOPSIS
|
loginctl [OPTIONS...] {COMMAND} [NAME...] |
DESCRIPTION
loginctl may be used to introspect and control the state of the systemd(1) login manager systemd-logind.service(8).
OPTIONS
The following options are understood:
−−no−legend
Do not print the legend, i.e. the column headers and the footer.
−−no−ask−password
Do not query the user for authentication for privileged operations.
−p, −−property=
When showing session/user/seat 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 session/user/seat properties, show all properties regardless of whether they are set or not.
−l, −−full
Do not ellipsize process tree entries.
−−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 the operation remotely. Specify a hostname, or username and hostname separated by "@", to connect to. This will use SSH to talk to the remote machine manager instance.
−M, −−machine=
Execute operation on a local container. Specify a container name to connect to.
−h, −−help
Print a short help text and exit.
−−version
Print a short version string and exit.
−−no−pager
Do not pipe output into a pager.
The following commands are understood:
list−sessions
List current sessions.
session−status ID...
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−session [ID...]
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 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 session−status if you are looking for formatted human−readable output.
activate ID...
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.
lock−session ID..., unlock−session ID...
Activates/deactivates the screen lock on one or more sessions, if the session supports it.
lock−sessions, unlock−sessions
Activates/deactivates the screen lock on all current sessions supporting it.
terminate−session ID...
Terminates a session. This kills all processes of the session and deallocates all resources attached to the session.
kill−session ID...
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−users
List currently logged in users.
user−status USER...
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−user [USER...]
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 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 user−status if you are looking for formatted human−readable output.
enable−linger USER..., disable−linger USER...
Enable/disable user lingering for one or more users. If enabled for a specific user, a user manager is spawned for the user at boot and kept around after logouts. This allows users who are not logged in to run long−running services.
terminate−user USER...
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.
kill−user USER...
Send a signal to all processes of a user. Use −−signal= to select the signal to send.
list−seats
List currently available seats on the local system.
seat−status NAME...
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−seat NAME...
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.
attach NAME DEVICE...
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.
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.
terminate−seat NAME...
Terminates all sessions on a seat. This kills all processes of all sessions on the seat and deallocates all runtime resources attached to them.
EXIT STATUS
On success, 0 is returned, a non−zero failure code otherwise.
ENVIRONMENT
$SYSTEMD_PAGER
Pager to use when −−no−pager is not given; overrides $PAGER. Setting this to an empty string or the value "cat" is equivalent to passing −−no−pager.
$SYSTEMD_LESS
Override the default options passed to less ("FRSXMK").
SEE ALSO
systemd(1), systemctl(1), systemd-logind.service(8), logind.conf(5)
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
