udev.conf − Configuration for device event managing daemon
/etc/udev/udev.conf
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:
udev_log
The log level. Valid values are the numerical syslog priorities or their textual representations: err, info and debug.
In addition, udevd can be configured by command−line options and the kernel command line (see udevd(8)).
udevd(8), udev(7), udevadm(8)