udevadm:tldr:61a4d

The command sudo udevadm monitor --udev is used to monitor events related to the udev (short for "userspace device") subsystem in Linux.

Udev is responsible for managing devices and their corresponding device files in the Linux kernel. It dynamically creates, removes, and manages device nodes in the /dev directory, which represent the devices connected to the system.

When you run udevadm monitor --udev with sudo (superuser do), it allows you to monitor udev events with root privileges. This is often required as device events can only be accessed by privileged users.

Running this command will start monitoring udev events in real-time. It will display information about device-related events such as device node creation, removal, or any changes in device attributes. The output will provide details like the event type, device path, action (add/remove/change), and other relevant information.

This command is often used by system administrators or developers to debug device-related issues, understand device changes, or automate tasks based on device events.