logind.conf(5)
NAME
logind.conf, logind.conf.d - Login manager configuration files
SYNOPSIS
/etc/systemd/logind.conf /etc/systemd/logind.conf.d/*.conf /run/systemd/logind.conf.d/*.conf /usr/lib/systemd/logind.conf.d/*.conf
DESCRIPTION
These files configure various parameters of the systemd login manager, systemd-logind.service(8).
CONFIGURATION DIRECTORIES AND PRECEDENCE
The default configuration is defined during compilation, so a configuration file is only needed when it is necessary to deviate from those defaults. By default, the configuration file in /etc/systemd/ contains commented out entries showing the defaults as a guide to the administrator. This file can be edited to create local overrides. When packages need to customize the configuration, they can install configuration snippets in /usr/lib/systemd/*.conf.d/. Files in /etc/ are reserved for the local administrator, who may use this logic to override the configuration files installed by vendor packages. The main configuration file is read before any of the configuration directories, and has the lowest precedence; entries in a file in any configuration directory override entries in the single configuration file. Files in the *.conf.d/ configuration subdirectories are sorted by their filename in lexicographic order, regardless of which of the subdirectories they reside in. If multiple files specify the same option, the entry in the file with the lexicographically latest name takes precedence. It is recommended to prefix all filenames in those subdirectories with a two-digit number and a dash, to simplify the ordering of the files. To disable a configuration file supplied by the vendor, the recommended way is to place a symlink to /dev/null in the configuration directory in /etc/, with the same filename as the vendor configuration file.
OPTIONS
All options are configured in the "[Login]" section:
NAutoVTs=
Takes a positive integer. Configures how many virtual terminals
(VTs) to allocate by default that, when switched to and are
previously unused, "autovt" services are automatically spawned on.
These services are instantiated from the template unit
autovt@.service for the respective VT TTY name, for example,
autovt@tty4.service. By default, autovt@.service is linked to
getty@.service. In other words, login prompts are started
dynamically as the user switches to unused virtual terminals.
Hence, this parameter controls how many login "gettys" are
available on the VTs. If a VT is already used by some other
subsystem (for example, a graphical login), this kind of activation
will not be attempted. Note that the VT configured in ReserveVT= is
always subject to this kind of activation, even if it is not one of
the VTs configured with the NAutoVTs= directive. Defaults to 6.
When set to 0, automatic spawning of "autovt" services is disabled.
ReserveVT=
Takes a positive integer. Identifies one virtual terminal that
shall unconditionally be reserved for autovt@.service activation
(see above). The VT selected with this option will be marked busy
unconditionally, so that no other subsystem will allocate it. This
functionality is useful to ensure that, regardless of how many VTs
are allocated by other subsystems, one login "getty" is always
available. Defaults to 6 (in other words, there will always be a
"getty" available on Alt-F6.). When set to 0, VT reservation is
disabled.
KillUserProcesses=
Takes a boolean argument. Configures whether the processes of a
user should be killed when the user logs out. If true, the scope
unit corresponding to the session and all processes inside that
scope will be terminated. If false, the scope is "abandoned", see
systemd.scope(5), and processes are not killed. Defaults to "yes",
but see the options KillOnlyUsers= and KillExcludeUsers= below.
In addition to session processes, user process may run under the
user manager unit user@.service. Depending on the linger settings,
this may allow users to run processes independent of their login
sessions. See the description of enable-linger in loginctl(1).
Note that setting KillUserProcesses=yes will break tools like
screen(1) and tmux(1), unless they are moved out of the session
scope. See example in systemd-run(1).
KillOnlyUsers=, KillExcludeUsers=
These settings take space-separated lists of usernames that
override the KillUserProcesses= setting. A user name may be added
to KillExcludeUsers= to exclude the processes in the session scopes
of that user from being killed even if KillUserProcesses=yes is
set. If KillExcludeUsers= is not set, the "root" user is excluded
by default. KillExcludeUsers= may be set to an empty value to
override this default. If a user is not excluded, KillOnlyUsers= is
checked next. If this setting is specified, only the session scopes
of those users will be killed. Otherwise, users are subject to the
KillUserProcesses=yes setting.
IdleAction=
Configures the action to take when the system is idle. Takes one of
"ignore", "poweroff", "reboot", "halt", "kexec", "suspend",
"hibernate", "hybrid-sleep", and "lock". Defaults to "ignore".
Note that this requires that user sessions correctly report the
idle status to the system. The system will execute the action after
all sessions report that they are idle, no idle inhibitor lock is
active, and subsequently, the time configured with IdleActionSec=
(see below) has expired.
IdleActionSec=
Configures the delay after which the action configured in
IdleAction= (see above) is taken after the system is idle.
InhibitDelayMaxSec=
Specifies the maximum time a system shutdown or sleep request is
delayed due to an inhibitor lock of type "delay" being active
before the inhibitor is ignored and the operation executes anyway.
Defaults to 5.
HandlePowerKey=, HandleSuspendKey=, HandleHibernateKey=,
HandleLidSwitch=, HandleLidSwitchDocked=
Controls how logind shall handle the system power and sleep keys
and the lid switch to trigger actions such as system power-off or
suspend. Can be one of "ignore", "poweroff", "reboot", "halt",
"kexec", "suspend", "hibernate", "hybrid-sleep", and "lock". If
"ignore", logind will never handle these keys. If "lock", all
running sessions will be screen-locked; otherwise, the specified
action will be taken in the respective event. Only input devices
with the "power-switch" udev tag will be watched for key/lid switch
events. HandlePowerKey= defaults to "poweroff". HandleSuspendKey=
and HandleLidSwitch= default to "suspend". HandleLidSwitchDocked=
defaults to "ignore". HandleHibernateKey= defaults to "hibernate".
If the system is inserted in a docking station, or if more than one
display is connected, the action specified by
HandleLidSwitchDocked= occurs; otherwise the HandleLidSwitch=
action occurs.
A different application may disable logind's handling of system
power and sleep keys and the lid switch by taking a low-level
inhibitor lock ("handle-power-key", "handle-suspend-key",
"handle-hibernate-key", "handle-lid-switch"). This is most commonly
used by graphical desktop environments to take over suspend and
hibernation handling, and to use their own configuration
mechanisms. If a low-level inhibitor lock is taken, logind will not
take any action when that key or switch is triggered and the
Handle*= settings are irrelevant.
PowerKeyIgnoreInhibited=, SuspendKeyIgnoreInhibited=,
HibernateKeyIgnoreInhibited=, LidSwitchIgnoreInhibited=
Controls whether actions that systemd-logind takes when the power
and sleep keys and the lid switch are triggered are subject to
high-level inhibitor locks ("shutdown", "sleep", "idle"). Low level
inhibitor locks ("handle-*-key"), are always honored, irrespective
of this setting.
These settings take boolean arguments. If "no", the inhibitor locks
taken by applications are respected. If "yes", "shutdown", "sleep",
and "idle" inhibitor locks are ignored. PowerKeyIgnoreInhibited=,
SuspendKeyIgnoreInhibited=, and HibernateKeyIgnoreInhibited=
default to "no". LidSwitchIgnoreInhibited= defaults to "yes". This
means that when systemd-logind is handling events by itself (no low
level inhibitor locks are taken by another application), the lid
switch does not respect suspend blockers by default, but the power
and sleep keys do.
HoldoffTimeoutSec=
Specifies the timeout after system startup or system resume in
which systemd will hold off on reacting to lid events. This is
required for the system to properly detect any hotplugged devices
so systemd can ignore lid events if external monitors, or docks,
are connected. If set to 0, systemd will always react immediately,
possibly before the kernel fully probed all hotplugged devices.
This is safe, as long as you do not care for systemd to account for
devices that have been plugged or unplugged while the system was
off. Defaults to 30s.
RuntimeDirectorySize=
Sets the size limit on the $XDG_RUNTIME_DIR runtime directory for
each user who logs in. Takes a size in bytes, optionally suffixed
with the usual K, G, M, and T suffixes, to the base 1024 (IEC).
Alternatively, a numerical percentage suffixed by "%" may be
specified, which sets the size limit relative to the amount of
physical RAM. Defaults to 10%. Note that this size is a safety
limit only. As each runtime directory is a tmpfs file system, it
will only consume as much memory as is needed.
InhibitorsMax=
Controls the maximum number of concurrent inhibitors to permit.
Defaults to 8192 (8K).
SessionsMax=
Controls the maximum number of concurrent user sessions to manage.
Defaults to 8192 (8K). Depending on how the pam_systemd.so module
is included in the PAM stack configuration, further login sessions
will either be refused, or permitted but not tracked by
systemd-logind.
UserTasksMax=
Sets the maximum number of OS tasks each user may run concurrently.
This controls the TasksMax= setting of the per-user slice unit, see
systemd.resource-control(5) for details. If assigned the special
value "infinity", no tasks limit is applied. Defaults to 33%, which
equals 10813 with the kernel's defaults on the host, but might be
smaller in OS containers.
RemoveIPC=
Controls whether System V and POSIX IPC objects belonging to the
user shall be removed when the user fully logs out. Takes a boolean
argument. If enabled, the user may not consume IPC resources after
the last of the user's sessions terminated. This covers System V
semaphores, shared memory and message queues, as well as POSIX
shared memory and message queues. Note that IPC objects of the root
user and other system users are excluded from the effect of this
setting. Defaults to "yes".
SEE ALSO
systemd(1), systemd-logind.service(8), loginctl(1), systemd- system.conf(5)
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