udev.conf(5) — Linux manual page


UDEV.CONF(5)                    udev.conf                   UDEV.CONF(5)

NAME         top

       udev.conf - Configuration for device event managing daemon

SYNOPSIS         top


DESCRIPTION         top

       systemd-udevd(8) expects its main configuration file at
       /etc/udev/udev.conf. It consists of a set of variables allowing
       the user to override default udev values. All empty lines or
       lines beginning with '#' are ignored. The following variables can
       be set:

           The log level. Valid values are the numerical syslog
           priorities or their textual representations: err, info and

           An integer. The maximum number of events executed in

           This is the same as the --children-max= option.

           An integer. 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.

           This is the same as the --exec-delay= option.

           An integer. The number of seconds to wait for events to
           finish. After this time, the event will be terminated. The
           default is 180 seconds.

           This is the same as the --event-timeout= option.

           Specifies 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.

           This is the same as the --resolve-names= option.

           Specifies a signal that systemd-udevd will send on worker
           timeouts. Note that both workers and spawned processes will
           be killed using this signal. Defaults to SIGKILL.

       In addition, systemd-udevd can be configured by command line
       options and the kernel command line (see systemd-udevd(8)).

SEE ALSO         top

       systemd-udevd(8), 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
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2021-04-01.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2021-04-01.)  If you discover 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

systemd 248                                                 UDEV.CONF(5)

Pages that refer to this page: systemd.directives(7)systemd.index(7)systemd-udevd.service(8)