Translations:Udev/11/en

Every time a change happens within the device structure, the kernel emits a uevent which gets picked up by udev. udev then follows the rules as declared in the, and  directories. Based on the information contained within the uevent, it finds the rule or rules it needs to trigger and performs the required actions. These actions can be creating or deleting device files, but can also trigger the loading of particular firmware files into the kernel memory.