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Under GNU General Public License
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SYSTEMD-UDEVD.SERVICE(8) systemd-udevd.service SYSTEMD-UDEVD.SERVICE(8)
NAME
systemd-udevd.service, systemd-udevd-control.socket, systemd-udevd-kernel.socket, systemd-
udevd - Device event managing daemon
SYNOPSIS
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]
DESCRIPTION
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.
OPTIONS
--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 30 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.
KERNEL COMMAND LINE
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.
SEE ALSO
udev.conf(5), udev(7), udevadm(8)
systemd 219 SYSTEMD-UDEVD.SERVICE(8)
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On Apache/2.4.6 (CentOS)
Under GNU General Public License
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