What is udev? # udev (userspace /dev) is a device manager for the Linux kernel. As the successor of devfsd and hotplug, udev primaily manages device nodes in the /dev directory. At the same time, udev also handls all user space events raised when hardware devices are added into the system or removed from it, including firmware loading as reuqired by certain devices. https://en.wikipedia.org/wiki/Udev udev first appeared at Linux kernel version 2.
