The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
The udev device manager dynamically creates or removes device node
files at boot time or if you add a device to or remove a device
from the system with a 2.6 version kernel or later. When creating
a device node, udev reads the device’s /sys
directory for attributes such as the label, serial number, and bus
device number.
Udev can use persistent device names to guarantee consistent naming of devices across reboots, regardless of their order of discovery. Persistent device names are especially important when using external storage devices.
The configuration file for udev is
/etc/udev/udev.conf, in which you can define
the following variables:
-
udev_log The logging priority, which can be set to
err,infoanddebug. The default value iserr.-
udev_root Specifies the location of the device nodes. The default value is
/dev.
For more information, see the udev(7) manual
page.