Simple definition
udevadm inspects Linux device properties and controls or tests udev event processing.
Purpose and use
udevadm is a control and diagnostic tool for examining udev device management.
How does it work?
It can query properties, monitor events and perform other operations according to the selected subcommand.
Example and verification
For a misidentified device, inspect properties and observe events when it is connected.
Points to watch
Not every subcommand is read-only: some trigger or change event processing.
In short
Choose an observation operation explicitly before altering device management.