udevmonitor prints the received event from the kernel [UEVENT] and the event which udev sends out after rule processing [UDEV] UEVENT[1161414120.003637] add@/devices/pci0000:00/0000:00:07.2/usb1/1-1 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1 SUBSYSTEM=usb SEQNUM=3801 PHYSDEVBUS=usb PHYSDEVDRIVER=usb UEVENT[1161414120.006707] add@/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0 SUBSYSTEM=usb SEQNUM=3802 PHYSDEVBUS=usb DEVICE=/proc/bus/usb/001/005 PRODUCT=ea0/6803/100 TYPE=0/0/0 INTERFACE=8/6/80 MODALIAS=usb:v0EA0p6803d0100dc00dsc00dp00ic08isc06ip50 UEVENT[1161414120.006748] add@/class/scsi_host/host3 ACTION=add DEVPATH=/class/scsi_host/host3 SUBSYSTEM=scsi_host SEQNUM=3803 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3 UEVENT[1161414120.006759] add@/class/usb_device/usbdev1.5 ACTION=add DEVPATH=/class/usb_device/usbdev1.5 SUBSYSTEM=usb_device SEQNUM=3804 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1 PHYSDEVBUS=usb PHYSDEVDRIVER=usb MAJOR=189 MINOR=4 UDEV [1161414120.050095] add@/devices/pci0000:00/0000:00:07.2/usb1/1-1 UDEV_LOG=3 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1 SUBSYSTEM=usb SEQNUM=3801 PHYSDEVBUS=usb PHYSDEVDRIVER=usb UDEVD_EVENT=1 UDEV [1161414120.171792] add@/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0 UDEV_LOG=3 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0 SUBSYSTEM=usb SEQNUM=3802 PHYSDEVBUS=usb DEVICE=/proc/bus/usb/001/005 PRODUCT=ea0/6803/100 TYPE=0/0/0 INTERFACE=8/6/80 MODALIAS=usb:v0EA0p6803d0100dc00dsc00dp00ic08isc06ip50 UDEVD_EVENT=1 UDEV [1161414120.215596] add@/class/scsi_host/host3 UDEV_LOG=3 ACTION=add DEVPATH=/class/scsi_host/host3 SUBSYSTEM=scsi_host SEQNUM=3803 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3 UDEVD_EVENT=1 UDEV [1161414120.277552] add@/class/usb_device/usbdev1.5 UDEV_LOG=3 ACTION=add DEVPATH=/class/usb_device/usbdev1.5 SUBSYSTEM=usb_device SEQNUM=3804 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1 PHYSDEVBUS=usb PHYSDEVDRIVER=usb MAJOR=189 MINOR=4 UDEVD_EVENT=1 USB_BUS=001 USB_DEV=005 DEVNAME=/dev/bus/usb/001/005 UEVENT[1161414125.009542] add@/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 SUBSYSTEM=scsi SEQNUM=3805 PHYSDEVBUS=scsi UEVENT[1161414125.009637] add@/class/scsi_disk/3:0:0:0 ACTION=add DEVPATH=/class/scsi_disk/3:0:0:0 SUBSYSTEM=scsi_disk SEQNUM=3806 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd UEVENT[1161414125.040072] add@/block/sda ACTION=add DEVPATH=/block/sda SUBSYSTEM=block SEQNUM=3807 MINOR=0 MAJOR=8 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd UEVENT[1161414125.040112] add@/block/sda/sda1 ACTION=add DEVPATH=/block/sda/sda1 SUBSYSTEM=block SEQNUM=3808 MINOR=1 MAJOR=8 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd UEVENT[1161414125.040126] add@/class/scsi_device/3:0:0:0 ACTION=add DEVPATH=/class/scsi_device/3:0:0:0 SUBSYSTEM=scsi_device SEQNUM=3809 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd UEVENT[1161414125.040138] add@/class/scsi_generic/sg0 ACTION=add DEVPATH=/class/scsi_generic/sg0 SUBSYSTEM=scsi_generic SEQNUM=3810 PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd MAJOR=21 MINOR=0 UDEV [1161414125.066442] add@/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 UDEV_LOG=3 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0 SUBSYSTEM=scsi SEQNUM=3805 PHYSDEVBUS=scsi UDEVD_EVENT=1 UDEV [1161414125.099028] add@/class/scsi_disk/3:0:0:0 UDEV_LOG=3 ACTION=add DEVPATH=/class/scsi_disk/3:0:0:0 SUBSYSTEM