udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
KERNEL[1673.080208] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
KERNEL[1673.099034] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
KERNEL[1673.102514] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003 (hid)
KERNEL[1673.104472] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/input/input7 (input)
KERNEL[1673.104943] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/input/input7/mouse3 (input)
KERNEL[1673.164966] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/input/input7/event5 (input)
KERNEL[1673.166153] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/hidraw/hidraw1 (hidraw)
UDEV [1673.176156] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
UDEV [1673.182675] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
UDEV [1673.186720] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003 (hid)
UDEV [1673.190504] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/hidraw/hidraw1 (hidraw)
UDEV [1673.191811] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/input/input7 (input)
UDEV [1673.196398] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/input/input7/mouse3 (input)
UDEV [1673.273790] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/0003:09DA:0006.0003/input/input7/event5 (input)