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Quick Reference of UDev

Last modified: May, 2014

Find Device Information

First, get device file name (e.g., can be from /var/log/messages, lsusb, etc.). Assume the name is /dev/bus/usb/001/002, we can do

udevadm info -q path -n /dev/bus/usb/001/002

This will return the device file path, something like “/devices/pci0000:00/xxx/xxx” which is a little long sometimes. After that, run

udevadm info -a -p /devices/pci0000:00/xxx/xxx

which will return all (very verbose) information regarding this device.

The above two commands can be combined as follows

udevadm info -a -p $(udevadm info -q path -n /dev/bus/usb/001/002)


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