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

UDEV  [1277239734.570401] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/002/007
DEVTYPE=usb_device
PRODUCT=54c/243/100
TYPE=0/0/0
BUSNUM=002
DEVNUM=007
SEQNUM=1784
ID_VENDOR=Sony
ID_VENDOR_ENC=Sony
ID_VENDOR_ID=054c
ID_MODEL=Storage_Media
ID_MODEL_ENC=Storage\x20Media
ID_MODEL_ID=0243
ID_REVISION=0100
ID_SERIAL=Sony_Storage_Media_2A08011691651
ID_SERIAL_SHORT=2A08011691651
ID_BUS=usb
ID_USB_INTERFACES=:080650:
MAJOR=189
MINOR=134
DEVLINKS=/dev/char/189:134

UDEV  [1277239734.570705] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=54c/243/100
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v054Cp0243d0100dc00dsc00dp00ic08isc06ip50
SEQNUM=1785

UDEV  [1277239734.571006] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=1786

UDEV  [1277239734.571308] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/scsi_host/host6 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/scsi_host/host6
SUBSYSTEM=scsi_host
SEQNUM=1787

UDEV  [1277239739.552817] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_target
SEQNUM=1788

UDEV  [1277239739.553239] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=1789

UDEV  [1277239739.553637] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/scsi_disk/6:0:0:0 (scsi_disk)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/scsi_disk/6:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=1790

UDEV  [1277239739.554247] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/scsi_device/6:0:0:0 (scsi_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/scsi_device/6:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=1791

UDEV  [1277239739.554262] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/bsg/6:0:0:0 (bsg)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/bsg/6:0:0:0
SUBSYSTEM=bsg
DEVNAME=/dev/bsg/6:0:0:0
SEQNUM=1793
MAJOR=253
MINOR=2
DEVLINKS=/dev/char/253:2

UDEV  [1277239739.554311] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/scsi_generic/sg2 (scsi_generic)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/scsi_generic/sg2
SUBSYSTEM=scsi_generic
DEVNAME=/dev/sg2
SEQNUM=1792
MAJOR=21
MINOR=2
DEVLINKS=/dev/char/21:2

UDEV  [1277239739.556442] change   /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sd
MODALIAS=scsi:t-0x00
SEQNUM=1794

UDEV  [1277239739.559591] add      /devices/virtual/bdi/8:16 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/8:16
SUBSYSTEM=bdi
SEQNUM=1797

UDEV  [1277239739.796697] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/block/sdb (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/block/sdb
SUBSYSTEM=block
DEVNAME=/dev/sdb
DEVTYPE=disk
SEQNUM=1795
ID_VENDOR=Sony
ID_VENDOR_ENC=Sony\x20\x20\x20\x20
ID_VENDOR_ID=054c
ID_MODEL=Storage_Media
ID_MODEL_ENC=Storage\x20Media\x20\x20\x20
ID_MODEL_ID=0243
ID_REVISION=0100
ID_SERIAL=Sony_Storage_Media_2A08011691651-0:0
ID_SERIAL_SHORT=2A08011691651
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:1d.0-usb-0:1.1:1.0-scsi-0:0:0:0
ID_PART_TABLE_TYPE=dos
UDISKS_PRESENTATION_NOPOLICY=0
UDISKS_PARTITION_TABLE=1
UDISKS_PARTITION_TABLE_SCHEME=mbr
UDISKS_PARTITION_TABLE_COUNT=1
MAJOR=8
MINOR=16
DEVLINKS=/dev/block/8:16 /dev/disk/by-id/usb-Sony_Storage_Media_2A08011691651-0:0 /dev/disk/by-path/pci-0000:00:1d.0-usb-0:1.1:1.0-scsi-0:0:0:0

UDEV  [1277239740.973218] add      /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/block/sdb/sdb1 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/block/sdb/sdb1
SUBSYSTEM=block
DEVNAME=/dev/sdb1
DEVTYPE=partition
SEQNUM=1796
ID_VENDOR=Sony
ID_VENDOR_ENC=Sony\x20\x20\x20\x20
ID_VENDOR_ID=054c
ID_MODEL=Storage_Media
ID_MODEL_ENC=Storage\x20Media\x20\x20\x20
ID_MODEL_ID=0243
ID_REVISION=0100
ID_SERIAL=Sony_Storage_Media_2A08011691651-0:0
ID_SERIAL_SHORT=2A08011691651
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:1d.0-usb-0:1.1:1.0-scsi-0:0:0:0
ID_PART_TABLE_TYPE=dos
ID_FS_UUID=68D4-F9FC
ID_FS_UUID_ENC=68D4-F9FC
ID_FS_VERSION=FAT32
ID_FS_TYPE=vfat
ID_FS_USAGE=filesystem
UDISKS_PRESENTATION_NOPOLICY=0
UDISKS_PARTITION=1
UDISKS_PARTITION_SCHEME=mbr
UDISKS_PARTITION_NUMBER=1
UDISKS_PARTITION_TYPE=0x0c
UDISKS_PARTITION_SIZE=4026514944
UDISKS_PARTITION_FLAGS=boot
UDISKS_PARTITION_SLAVE=/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/host6/target6:0:0/6:0:0:0/block/sdb
UDISKS_PARTITION_OFFSET=16384
UDISKS_PARTITION_ALIGNMENT_OFFSET=0
MAJOR=8
MINOR=17
DEVLINKS=/dev/block/8:17 /dev/disk/by-id/usb-Sony_Storage_Media_2A08011691651-0:0-part1 /dev/disk/by-path/pci-0000:00:1d.0-usb-0:1.1:1.0-scsi-0:0:0:0-part1 /dev/disk/by-uuid/68D4-F9FC