Udev
Udev is a device manager for the Linux kernel that dynamically manages device nodes in the /dev directory. It handles device events, such as when a USB drive is plugged in or a network interface is detected, by creating, removing, or modifying device nodes based on rules and configuration files. It replaces the older static /dev system and provides a flexible, user-space approach to device management.
Developers should learn Udev when working on Linux systems that require automated device handling, such as embedded systems, servers, or desktop environments. It is essential for creating custom rules to manage hardware events, like setting permissions for specific devices or triggering scripts when devices are connected, which is common in IoT projects, system administration, and driver development.