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

UDEV  [47403.528945] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10 (usb)
ACTION=add
BUSNUM=001
DEVNAME=/dev/bus/usb/001/009
DEVNUM=009
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10
DEVTYPE=usb_device
ID_BUS=usb
ID_DRIVE_THUMB=1
ID_MODEL=DataTraveler_G3
ID_MODEL_ENC=DataTraveler\x20G3
ID_MODEL_ID=1643
ID_PRODUCT_FROM_DATABASE=DataTraveler G3 4GB
ID_REVISION=0100
ID_SERIAL=Kingston_DataTraveler_G3_0019E06B0851BB6187250024
ID_SERIAL_SHORT=0019E06B0851BB6187250024
ID_USB_INTERFACES=:080650:
ID_VENDOR=Kingston
ID_VENDOR_ENC=Kingston
ID_VENDOR_FROM_DATABASE=Kingston Technology
ID_VENDOR_ID=0951
MAJOR=189
MINOR=8
PRODUCT=951/1643/100
SEQNUM=2166
SUBSYSTEM=usb
TYPE=0/0/0
USEC_INITIALIZED=403511969

UDEV  [47403.532150] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0
DEVTYPE=usb_interface
ID_PRODUCT_FROM_DATABASE=DataTraveler G3 4GB
ID_VENDOR_FROM_DATABASE=Kingston Technology
INTERFACE=8/6/80
MODALIAS=usb:v0951p1643d0100dc00dsc00dp00ic08isc06ip50in00
PRODUCT=951/1643/100
SEQNUM=2167
SUBSYSTEM=usb
TYPE=0/0/0
USEC_INITIALIZED=3512718

UDEV  [47403.534090] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12 (scsi)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12
DEVTYPE=scsi_host
SEQNUM=2168
SUBSYSTEM=scsi
USEC_INITIALIZED=3512796

UDEV  [47403.535269] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/scsi_host/host12 (scsi_host)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/scsi_host/host12
SEQNUM=2169
SUBSYSTEM=scsi_host
USEC_INITIALIZED=3512820

UDEV  [47404.540448] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0 (scsi)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0
DEVTYPE=scsi_target
SEQNUM=2170
SUBSYSTEM=scsi
USEC_INITIALIZED=4538917

UDEV  [47404.541595] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0 (scsi)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=2171
SUBSYSTEM=scsi
USEC_INITIALIZED=4538994

UDEV  [47404.545053] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/scsi_disk/12:0:0:0 (scsi_disk)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/scsi_disk/12:0:0:0
SEQNUM=2172
SUBSYSTEM=scsi_disk
USEC_INITIALIZED=4539038

UDEV  [47404.545085] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/scsi_device/12:0:0:0 (scsi_device)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/scsi_device/12:0:0:0
SEQNUM=2173
SUBSYSTEM=scsi_device
USEC_INITIALIZED=404539112

UDEV  [47404.547714] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/scsi_generic/sg4 (scsi_generic)
ACTION=add
DEVNAME=/dev/sg4
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/scsi_generic/sg4
MAJOR=21
MINOR=4
SEQNUM=2174
SUBSYSTEM=scsi_generic
USEC_INITIALIZED=404539440

UDEV  [47404.547755] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/bsg/12:0:0:0 (bsg)
ACTION=add
DEVNAME=/dev/bsg/12:0:0:0
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/bsg/12:0:0:0
MAJOR=252
MINOR=4
SEQNUM=2175
SUBSYSTEM=bsg
USEC_INITIALIZED=404539788

UDEV  [47405.537202] add      /devices/virtual/bdi/8:48 (bdi)
ACTION=add
DEVPATH=/devices/virtual/bdi/8:48
SEQNUM=2176
SUBSYSTEM=bdi
USEC_INITIALIZED=5536333

UDEV  [47405.653736] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/block/sdd (block)
ACTION=add
DEVLINKS=/dev/disk/by-id/usb-Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0 /dev/disk/by-path/pci-0000:00:02.1-usb-0:10:1.0-scsi-0:0:0:0
DEVNAME=/dev/sdd
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/block/sdd
DEVTYPE=disk
DM_MULTIPATH_DEVICE_PATH=1
ID_BUS=usb
ID_DRIVE_THUMB=1
ID_INSTANCE=0:0
ID_MODEL=DataTraveler_G3
ID_MODEL_ENC=DataTraveler\x20G3\x20
ID_MODEL_ID=1643
ID_PART_TABLE_TYPE=dos
ID_PATH=pci-0000:00:02.1-usb-0:10:1.0-scsi-0:0:0:0
ID_PATH_TAG=pci-0000_00_02_1-usb-0_10_1_0-scsi-0_0_0_0
ID_REVISION=PMAP
ID_SERIAL=Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0
ID_SERIAL_SHORT=0019E06B0851BB6187250024
ID_TYPE=disk
ID_USB_DRIVER=usb-storage
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_VENDOR=Kingston
ID_VENDOR_ENC=Kingston
ID_VENDOR_ID=0951
MAJOR=8
MINOR=48
MPATH_SBIN_PATH=/sbin
SEQNUM=2177
SUBSYSTEM=block
TAGS=:systemd:
UDISKS_PARTITION_TABLE=1
UDISKS_PARTITION_TABLE_COUNT=1
UDISKS_PARTITION_TABLE_SCHEME=mbr
UDISKS_PRESENTATION_NOPOLICY=0
USEC_INITIALIZED=5561371

UDEV  [47405.664856] add      /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/block/sdd/sdd1 (block)
ACTION=add
DEVLINKS=/dev/disk/by-id/usb-Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0-part1 /dev/disk/by-path/pci-0000:00:02.1-usb-0:10:1.0-scsi-0:0:0:0-part1
DEVNAME=/dev/sdd1
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/block/sdd/sdd1
DEVTYPE=partition
ID_BUS=usb
ID_DRIVE_THUMB=1
ID_INSTANCE=0:0
ID_MODEL=DataTraveler_G3
ID_MODEL_ENC=DataTraveler\x20G3\x20
ID_MODEL_ID=1643
ID_PART_TABLE_TYPE=dos
ID_PATH=pci-0000:00:02.1-usb-0:10:1.0-scsi-0:0:0:0
ID_PATH_TAG=pci-0000_00_02_1-usb-0_10_1_0-scsi-0_0_0_0
ID_REVISION=PMAP
ID_SERIAL=Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0
ID_SERIAL_SHORT=0019E06B0851BB6187250024
ID_TYPE=disk
ID_USB_DRIVER=usb-storage
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_VENDOR=Kingston
ID_VENDOR_ENC=Kingston
ID_VENDOR_ID=0951
MAJOR=8
MINOR=49
MPATH_SBIN_PATH=/sbin
SEQNUM=2178
SUBSYSTEM=block
TAGS=:systemd:
UDISKS_PRESENTATION_NOPOLICY=0
USEC_INITIALIZED=5561451

UDEV  [47405.673521] add      /devices/virtual/bdi/253:3 (bdi)
ACTION=add
DEVPATH=/devices/virtual/bdi/253:3
SEQNUM=2180
SUBSYSTEM=bdi
USEC_INITIALIZED=5671976

UDEV  [47405.673596] remove   /devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/block/sdd/sdd1 (block)
ACTION=remove
DEVLINKS=/dev/disk/by-id/usb-Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0-part1 /dev/disk/by-path/pci-0000:00:02.1-usb-0:10:1.0-scsi-0:0:0:0-part1
DEVNAME=/dev/sdd1
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-10/1-10:1.0/host12/target12:0:0/12:0:0:0/block/sdd/sdd1
DEVTYPE=partition
ID_BUS=usb
ID_DRIVE_THUMB=1
ID_INSTANCE=0:0
ID_MODEL=DataTraveler_G3
ID_MODEL_ENC=DataTraveler\x20G3\x20
ID_MODEL_ID=1643
ID_PART_TABLE_TYPE=dos
ID_PATH=pci-0000:00:02.1-usb-0:10:1.0-scsi-0:0:0:0
ID_PATH_TAG=pci-0000_00_02_1-usb-0_10_1_0-scsi-0_0_0_0
ID_REVISION=PMAP
ID_SERIAL=Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0
ID_SERIAL_SHORT=0019E06B0851BB6187250024
ID_TYPE=disk
ID_USB_DRIVER=usb-storage
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_VENDOR=Kingston
ID_VENDOR_ENC=Kingston
ID_VENDOR_ID=0951
MAJOR=8
MINOR=49
MPATH_SBIN_PATH=/sbin
SEQNUM=2179
SUBSYSTEM=block
TAGS=:systemd:
UDISKS_PRESENTATION_NOPOLICY=0
USEC_INITIALIZED=5561451

UDEV  [47405.677461] add      /devices/virtual/block/dm-3 (block)
ACTION=add
DEVNAME=/dev/dm-3
DEVPATH=/devices/virtual/block/dm-3
DEVTYPE=disk
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_DISABLE_OTHER_RULES_FLAG=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
MAJOR=253
MINOR=3
MPATH_SBIN_PATH=/sbin
SEQNUM=2181
SUBSYSTEM=block
SYSTEMD_READY=0
TAGS=:systemd:
UDISKS_PRESENTATION_NOPOLICY=1
USEC_INITIALIZED=5672191

UDEV  [47405.791657] add      /devices/virtual/bdi/253:4 (bdi)
ACTION=add
DEVPATH=/devices/virtual/bdi/253:4
SEQNUM=2183
SUBSYSTEM=bdi
USEC_INITIALIZED=5790872

UDEV  [47405.795900] add      /devices/virtual/block/dm-4 (block)
ACTION=add
DEVNAME=/dev/dm-4
DEVPATH=/devices/virtual/block/dm-4
DEVTYPE=disk
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_DISABLE_OTHER_RULES_FLAG=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
MAJOR=253
MINOR=4
MPATH_SBIN_PATH=/sbin
SEQNUM=2184
SUBSYSTEM=block
SYSTEMD_READY=0
TAGS=:systemd:
UDISKS_PRESENTATION_NOPOLICY=1
USEC_INITIALIZED=5791360

UDEV  [47405.797041] change   /devices/virtual/block/dm-3 (block)
ACTION=change
DEVLINKS=/dev/disk/by-id/dm-name-mpathb /dev/disk/by-id/dm-uuid-mpath-Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0 /dev/mapper/mpathb
DEVNAME=/dev/dm-3
DEVPATH=/devices/virtual/block/dm-3
DEVTYPE=disk
DM_COOKIE=6291456
DM_NAME=mpathb
DM_SUSPENDED=0
DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
DM_UUID=mpath-Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0
ID_PART_TABLE_TYPE=dos
MAJOR=253
MINOR=3
MPATH_SBIN_PATH=/sbin
SEQNUM=2182
SUBSYSTEM=block
TAGS=:systemd:
UDISKS_DM_TARGETS_COUNT=1
UDISKS_DM_TARGETS_LENGTH=15646720
UDISKS_DM_TARGETS_PARAMS=0\x200\x201\x201\x20service-time\x200\x201\x202\x208:48\x201\x201\x20
UDISKS_DM_TARGETS_START=0
UDISKS_DM_TARGETS_TYPE=multipath
UDISKS_PARTITION_TABLE=1
UDISKS_PARTITION_TABLE_COUNT=1
UDISKS_PARTITION_TABLE_SCHEME=mbr
UDISKS_PRESENTATION_NOPOLICY=1
USEC_INITIALIZED=5672191

UDEV  [47405.890349] change   /devices/virtual/block/dm-4 (block)
ACTION=change
DEVLINKS=/dev/disk/by-id/dm-name-mpathbp1 /dev/disk/by-id/dm-uuid-part1-mpath-Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0 /dev/disk/by-label/Kingston /dev/disk/by-uuid/0664-DC89 /dev/mapper/mpathbp1
DEVNAME=/dev/dm-4
DEVPATH=/devices/virtual/block/dm-4
DEVTYPE=disk
DM_COOKIE=6291456
DM_NAME=mpathbp1
DM_SUSPENDED=0
DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG=1
DM_UDEV_PRIMARY_SOURCE_FLAG=1
DM_UDEV_RULES_VSN=2
DM_UUID=part1-mpath-Kingston_DataTraveler_G3_0019E06B0851BB6187250024-0:0
ID_FS_LABEL=Kingston
ID_FS_LABEL_ENC=Kingston
ID_FS_TYPE=vfat
ID_FS_USAGE=filesystem
ID_FS_UUID=0664-DC89
ID_FS_UUID_ENC=0664-DC89
ID_FS_VERSION=FAT32
ID_PART_ENTRY_DISK=253:3
ID_PART_ENTRY_NUMBER=1
ID_PART_ENTRY_OFFSET=63
ID_PART_ENTRY_SCHEME=dos
ID_PART_ENTRY_SIZE=15646657
ID_PART_ENTRY_TYPE=0xc
MAJOR=253
MINOR=4
MPATH_SBIN_PATH=/sbin
SEQNUM=2185
SUBSYSTEM=block
TAGS=:systemd:
UDISKS_DM_TARGETS_COUNT=1
UDISKS_DM_TARGETS_LENGTH=15646657
UDISKS_DM_TARGETS_PARAMS=253:3\x2063
UDISKS_DM_TARGETS_START=0
UDISKS_DM_TARGETS_TYPE=linear
UDISKS_PARTITION=1
UDISKS_PARTITION_ALIGNMENT_OFFSET=0
UDISKS_PARTITION_NUMBER=1
UDISKS_PARTITION_OFFSET=32256
UDISKS_PARTITION_SCHEME=mbr
UDISKS_PARTITION_SIZE=8011088384
UDISKS_PARTITION_SLAVE=/sys/devices/virtual/block/dm-3
UDISKS_PARTITION_TYPE=0x0c
UDISKS_PRESENTATION_NOPOLICY=1
USEC_INITIALIZED=5791360