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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | KERNEL COMMAND LINE | SEE ALSO | COLOPHON |
SYSTEMD-UDEVD.SERVICE(8) systemd-udevd.service SYSTEMD-UDEVD.SERVICE(8)
systemd-udevd.service, systemd-udevd-control.socket, systemd-udevd-
kernel.socket, systemd-udevd - Device event managing daemon
systemd-udevd.service
systemd-udevd-control.socket
systemd-udevd-kernel.socket
/usr/lib/systemd/systemd-udevd [--daemon] [--debug] [--children-max=]
[--exec-delay=] [--event-timeout=]
[--resolve-names=early|late|never]
[--version] [--help]
systemd-udevd listens to kernel uevents. For every event,
systemd-udevd executes matching instructions specified in udev rules.
See udev(7).
The behavior of the daemon can be configured using udev.conf(5), its
command line options, environment variables, and on the kernel
command line, or changed dynamically with udevadm control.
--daemon
Detach and run in the background.
--debug
Print debug messages to standard error.
--children-max=
Limit the number of events executed in parallel.
--exec-delay=
Delay the execution of RUN instructions by the given number of
seconds. This option might be useful when debugging system
crashes during coldplug caused by loading non-working kernel
modules.
--event-timeout=
Set the number of seconds to wait for events to finish. After
this time, the event will be terminated. The default is 180
seconds.
--resolve-names=
Specify when systemd-udevd should resolve names of users and
groups. When set to early (the default), names will be resolved
when the rules are parsed. When set to late, names will be
resolved for every event. When set to never, names will never be
resolved and all devices will be owned by root.
--help
Print a short help text and exit.
--version
Print a short version string and exit.
Parameters starting with "rd." will be read when systemd-udevd is
used in an initrd.
udev.log_priority=, rd.udev.log_priority=
Set the log level.
udev.children_max=, rd.udev.children_max=
Limit the number of events executed in parallel.
udev.exec_delay=, rd.udev.exec_delay=
Delay the execution of RUN instructions by the given number of
seconds. This option might be useful when debugging system
crashes during coldplug caused by loading non-working kernel
modules.
udev.event_timeout=, rd.udev.event_timeout=
Wait for events to finish up to the given number of seconds. This
option might be useful if events are terminated due to kernel
drivers taking too long to initialize.
net.ifnames=
Network interfaces are renamed to give them predictable names
when possible. It is enabled by default; specifying 0 disables
it.
udev.conf(5), udev(7), udevadm(8)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2017-07-05. If you dis‐
cover any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
systemd 234 SYSTEMD-UDEVD.SERVICE(8)
Pages that refer to this page: systemd.link(5), udev.conf(5), file-hierarchy(7), kernel-command-line(7), systemd.directives(7), systemd.index(7), udev(7), systemd-vconsole-setup.service(8), udevadm(8)