udevd listens to kernel uevents and passes the incoming events to udev. It ensures the correct event order and takes care, that events for child devices are delayed until the parent event has finished the device handling. The behavior of the running daemon can be changed with udevadm control.

What is Systemd-Udevd?

systemd-udevd listens to kernel uevents. For every event, systemd-udevd executes matching instructions specified in udev rules. … The behavior of the daemon can be configured using udev. conf(5), its command line options, environment variables, and on the kernel command line, or changed dynamically with udevadm control.

What is the purpose of udev?

udev is a replacement for the Device File System (DevFS) starting with the Linux 2.6 kernel series. It allows you to identify devices based on their properties, like vendor ID and device ID, dynamically. udev runs in userspace (as opposed to devfs which was executed in kernel space).