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

KERNEL[311.934721] add      /devices/platform/msm_hsusb/gadget/net/usb0 (net)
ACTION=add
DEVPATH=/devices/platform/msm_hsusb/gadget/net/usb0
DEVTYPE=gadget
IFINDEX=19
INTERFACE=usb0
SEQNUM=2571
SUBSYSTEM=net
UDEV_LOG=3

KERNEL[311.934904] add      /devices/platform/msm_hsusb/gadget/net/usb0/queues/rx-0 (queues)
ACTION=add
DEVPATH=/devices/platform/msm_hsusb/gadget/net/usb0/queues/rx-0
SEQNUM=2572
SUBSYSTEM=queues
UDEV_LOG=3

KERNEL[311.935911] add      /devices/platform/msm_hsusb/gadget/net/usb0/queues/tx-0 (queues)
ACTION=add
DEVPATH=/devices/platform/msm_hsusb/gadget/net/usb0/queues/tx-0
SEQNUM=2573
SUBSYSTEM=queues
UDEV_LOG=3