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

UDEV  [1299519425.118329] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/002/008
DEVTYPE=usb_device
PRODUCT=5ac/1261/1
TYPE=0/0/0
BUSNUM=002
DEVNUM=008
SEQNUM=1863
ID_VENDOR=Apple_Inc.
ID_VENDOR_ENC=Apple\x20Inc.
ID_VENDOR_ID=05ac
ID_MODEL=iPod
ID_MODEL_ENC=iPod
ID_MODEL_ID=1261
ID_REVISION=0001
ID_SERIAL=Apple_Inc._iPod_000A270013281B26
ID_SERIAL_SHORT=000A270013281B26
ID_BUS=usb
ID_USB_INTERFACES=:080650:010100:010200:030000:
MAJOR=189
MINOR=135
DEVLINKS=/dev/char/189:135

UDEV  [1299519425.120143] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=5ac/1261/1
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v05ACp1261d0001dc00dsc00dp00ic08isc06ip50
SEQNUM=1864

UDEV  [1299519425.120566] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=1865

UDEV  [1299519425.121435] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/scsi_host/host16 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/scsi_host/host16
SUBSYSTEM=scsi_host
SEQNUM=1866

UDEV  [1299519426.104662] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_target
SEQNUM=1867

UDEV  [1299519426.105263] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=1868

UDEV  [1299519426.106011] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/scsi_disk/16:0:0:0 (scsi_disk)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/scsi_disk/16:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=1869

UDEV  [1299519426.106583] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/scsi_device/16:0:0:0 (scsi_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/scsi_device/16:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=1870

UDEV  [1299519426.108481] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/bsg/16:0:0:0 (bsg)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/bsg/16:0:0:0
SUBSYSTEM=bsg
DEVNAME=/dev/bsg/16:0:0:0
SEQNUM=1872
MAJOR=253
MINOR=2
DEVLINKS=/dev/char/253:2

UDEV  [1299519426.109983] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/scsi_generic/sg2 (scsi_generic)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/scsi_generic/sg2
SUBSYSTEM=scsi_generic
DEVNAME=/dev/sg2
SEQNUM=1871
MAJOR=21
MINOR=2
DEVLINKS=/dev/char/21:2

UDEV  [1299519431.019010] change   /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sd
MODALIAS=scsi:t-0x00
SEQNUM=1873

UDEV  [1299519431.197479] add      /devices/virtual/bdi/8:16 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/8:16
SUBSYSTEM=bdi
SEQNUM=1876

UDEV  [1299519431.473649] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/block/sdb (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/block/sdb
SUBSYSTEM=block
DEVNAME=/dev/sdb
DEVTYPE=disk
SEQNUM=1874
ID_VENDOR=Apple
ID_VENDOR_ENC=Apple\x20\x20\x20
ID_VENDOR_ID=05ac
ID_MODEL=iPod
ID_MODEL_ENC=iPod\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
ID_MODEL_ID=1261
ID_REVISION=1.62
ID_SERIAL=Apple_iPod_000A270013281B26-0:0
ID_SERIAL_SHORT=000A270013281B26
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:010100:010200:030000:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0
ID_FS_LABEL=iPod
ID_FS_LABEL_ENC=iPod
ID_FS_UUID=A88B-3652
ID_FS_UUID_ENC=A88B-3652
ID_FS_VERSION=FAT32
ID_FS_TYPE=vfat
ID_FS_USAGE=filesystem
UDISKS_PRESENTATION_NOPOLICY=0
MAJOR=8
MINOR=16
DEVLINKS=/dev/block/8:16 /dev/disk/by-id/usb-Apple_iPod_000A270013281B26-0:0 /dev/disk/by-path/pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0 /dev/disk/by-uuid/A88B-3652 /dev/disk/by-label/iPod

UDEV  [1299519432.861742] add      /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/block/sdb/sdb1 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/block/sdb/sdb1
SUBSYSTEM=block
DEVNAME=/dev/sdb1
DEVTYPE=partition
SEQNUM=1875
ID_VENDOR=Apple
ID_VENDOR_ENC=Apple\x20\x20\x20
ID_VENDOR_ID=05ac
ID_MODEL=iPod
ID_MODEL_ENC=iPod\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
ID_MODEL_ID=1261
ID_REVISION=1.62
ID_SERIAL=Apple_iPod_000A270013281B26-0:0
ID_SERIAL_SHORT=000A270013281B26
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:010100:010200:030000:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0
ID_FS_LABEL=ALEX_S_IPOD
ID_FS_LABEL_ENC=ALEX\x27S\x20IPOD
ID_FS_UUID=3141-5926
ID_FS_UUID_ENC=3141-5926
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=0x0b
UDISKS_PARTITION_SIZE=159840038912
UDISKS_PARTITION_SLAVE=/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/host16/target16:0:0/16:0:0:0/block/sdb
UDISKS_PARTITION_OFFSET=258048
UDISKS_PARTITION_ALIGNMENT_OFFSET=0
UDISKS_PRESENTATION_ICON_NAME=multimedia-player-apple-ipod-classic-black
UDISKS_PRESENTATION_NAME=Alex?s iPod
MAJOR=8
MINOR=17
DEVLINKS=/dev/block/8:17 /dev/disk/by-id/usb-Apple_iPod_000A270013281B26-0:0-part1 /dev/disk/by-path/pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0-part1 /dev/disk/by-uuid/3141-5926 /dev/disk/by-label/ALEX\x27S\x20IPOD