monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

UDEV  [1270667212.261582] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-4 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/002/005
DEVTYPE=usb_device
PRODUCT=930/6533/100
TYPE=0/0/0
BUSNUM=002
DEVNUM=005
SEQNUM=1696
ID_VENDOR=Kingston
ID_VENDOR_ENC=Kingston
ID_VENDOR_ID=0930
ID_MODEL=DataTraveler_2.0
ID_MODEL_ENC=DataTraveler\x202.0
ID_MODEL_ID=6533
ID_REVISION=0100
ID_SERIAL=Kingston_DataTraveler_2.0_08609350F333088A
ID_SERIAL_SHORT=08609350F333088A
ID_BUS=usb
ID_USB_INTERFACES=:080650:
MAJOR=189
MINOR=132
DEVLINKS=/dev/char/189:132

UDEV  [1270667212.267917] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=930/6533/100
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v0930p6533d0100dc00dsc00dp00ic08isc06ip50
SEQNUM=1697

UDEV  [1270667212.268929] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=1698

UDEV  [1270667212.269660] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9/scsi_host/host9 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9/scsi_host/host9
SUBSYSTEM=scsi_host
SEQNUM=1699

UDEV  [1270667217.298620] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9/scsi_host/host9 (scsi_host)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9/scsi_host/host9
SUBSYSTEM=scsi_host
SEQNUM=1700

UDEV  [1270667217.298970] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9 (scsi)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0/host9
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=1701

UDEV  [1270667217.299522] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0 (usb)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=930/6533/100
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v0930p6533d0100dc00dsc00dp00ic08isc06ip50
SEQNUM=1702

UDEV  [1270667217.300191] remove   /devices/pci0000:00/0000:00:1d.7/usb2/2-4 (usb)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/002/005
DEVTYPE=usb_device
PRODUCT=930/6533/100
TYPE=0/0/0
BUSNUM=002
DEVNUM=005
SEQNUM=1703
ID_VENDOR=Kingston
ID_VENDOR_ENC=Kingston
ID_VENDOR_ID=0930
ID_MODEL=DataTraveler_2.0
ID_MODEL_ENC=DataTraveler\x202.0
ID_MODEL_ID=6533
ID_REVISION=0100
ID_SERIAL=Kingston_DataTraveler_2.0_08609350F333088A
ID_SERIAL_SHORT=08609350F333088A
ID_BUS=usb
ID_USB_INTERFACES=:080650:
MAJOR=189
MINOR=132
DEVLINKS=/dev/char/189:132