udevadm

udevadm is a command line tool used to manage and interact with the udev system in Linux. It stands for "udev administrator" and is typically used in system administration tasks.

This tool allows users to query and modify the udev database, which contains information about hardware devices in the system. It provides detailed information about devices such as their properties, attributes, and sysfs paths. Information can be retrieved using commands like "udevadm info" followed by the device file or sysfs path.

udevadm also offers the capability to trigger events, which can be useful when troubleshooting or manually configuring devices. With the "udevadm trigger" command, events related to devices can be retriggered, causing actions defined in the respective udev rules to be executed.

Additionally, the tool provides options to monitor and debug udev events with commands like "udevadm monitor" and "udevadm test". These commands allow users to observe the events and associated actions taken by udev, aiding in troubleshooting driver or device-related issues.

Overall, udevadm provides a powerful and flexible command line interface for working with the udev system, facilitating device management and troubleshooting in Linux environments.