tldr/pages/linux/evtest.md

evtest

Display information from input device drivers. More information: https://manned.org/evtest.

• List all detected input devices:

sudo evtest

• Display events from a specific input device:

sudo evtest /dev/input/event{{number}}

• Grab the device exclusively, preventing other clients from receiving events:

sudo evtest --grab /dev/input/event{{number}}

• Query the state of a specific key or button on an input device:

sudo evtest --query /dev/input/event{{number}} {{event_type}} {{event_code}}