NAME | SYNOPSIS | DESCRIPTION | OPTIONS | KERNEL COMMAND LINE | SEE ALSO | COLOPHON

SYSTEMD-UDEVD.SERVICE(8)    systemd-udevd.service   SYSTEMD-UDEVD.SERVICE(8)

NAME         top

       systemd-udevd.service, systemd-udevd-control.socket, systemd-udevd-
       kernel.socket, systemd-udevd - Device event managing daemon

SYNOPSIS         top

       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         top

       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         top

       --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.

KERNEL COMMAND LINE         top

       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         top

       udev.conf(5), udev(7), udevadm(8)

COLOPHON         top

       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 2016-10-04.  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 231                                         SYSTEMD-UDEVD.SERVICE(8)