lillypad:/usr/local/sbin# udevmonitor 
udevmonitor will print the received events for:
UDEV the event which udev sends out after rule processing
UEVENT the kernel uevent


UDEV  [1194996611.917602] add      /devices/pci0000:00/0000:00:1d.1/usb2/2-2 (usb)
UDEV  [1194996611.920590] add      /class/usb_endpoint/usbdev2.47_ep00 (usb_endpoint)
UDEV  [1194996611.920704] add      /devices/pci0000:00/0000:00:1d.1/usb2/2-2/2-2:1.0 (usb)
UEVENT[1194996611.920809] add      /class/usb_device/usbdev2.47 (usb_device)
UDEV  [1194996612.133957] add      /class/usb_device/usbdev2.47 (usb_device)
UDEV  [1194996617.317052] remove   /devices/pci0000:00/0000:00:1d.1/usb2/2-2/2-2:1.0 (usb)
UDEV  [1194996617.317262] remove   /class/usb_device/usbdev2.47 (usb_device)
UDEV  [1194996617.317371] remove   /class/usb_endpoint/usbdev2.47_ep00 (usb_endpoint)
UEVENT[1194996617.317475] remove   /devices/pci0000:00/0000:00:1d.1/usb2/2-2 (usb)