---
name: "udev.conf"
section: "5"
platform: "linux"
package: "systemd"
version: "262.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/udev.conf"
---

# udev.conf(5)

Configuration for device event managing daemon

## NAME

udev.conf, udev.conf.d - Configuration for device event managing daemon

## SYNOPSIS

/etc/udev/udev.conf

/run/udev/udev.conf

/usr/local/lib/udev/udev.conf

/usr/lib/udev/udev.conf

/etc/udev/udev.conf.d/\*.conf

/run/udev/udev.conf.d/\*.conf

/usr/local/lib/udev/udev.conf.d/\*.conf

/usr/lib/udev/udev.conf.d/\*.conf

## DESCRIPTION

These files contain configuration options for [**systemd-udevd**(8)](/systemd-udevd/8.md). The syntax of these files is very simple: a list of assignments, one per line. All empty lines or lines beginning with "#" are ignored.

The following options can be set:

*udev\_log=*

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

**Note**\
 This option is also honored by [**udevadm**(8)](/udevadm/8.md).

Added in version 216.

*children\_max=*

An integer. The maximum number of events executed in parallel. When unspecified or 0 is specified, the maximum is determined based on the system resources.

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

Added in version 240.

*exec\_delay=*

An integer. Delay the execution of each *RUN{program}* parameter 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.

Added in version 240.

*event\_timeout=*

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.

Added in version 240.

*resolve\_names=*

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.

Added in version 240.

*timeout\_signal=*

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**.

Added in version 246.

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

## SEE ALSO

[**systemd-udevd**(8)](/systemd-udevd/8.md), [**udev**(7)](/udev/7.md), [**udevadm**(8)](/udevadm/8.md)