ltsmash@kubuntu-desktop:~$ sudo udevmonitor
udevmonitor will print the received events for:
UDEV the event which udev sends out after rule processing
UEVENT the kernel uevent

UDEV  [1198809153.924792] add      /devices/pci0000:00/0000:00:1d.7/usb4/4-4 (usb)
UDEV  [1198809153.925173] add      /class/usb_endpoint/usbdev4.5_ep00 (usb_endpoint)
UEVENT[1198809153.925329] add      /devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.0 (usb)
UDEV  [1198809154.013944] add      /devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.0 (usb)
UDEV  [1198809154.124907] add      /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UDEV  [1198809154.125557] add      /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UEVENT[1198809154.125802] add      /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UEVENT[1198809154.125937] add      /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UEVENT[1198809154.126062] add      /class/firmware/4-4 (firmware)
UDEV  [1198809154.128339] add      /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UDEV  [1198809154.130685] add      /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UEVENT[1198809154.182957] remove   /class/firmware/4-4 (firmware)
UEVENT[1198809154.183352] add      /class/firmware/4-4 (firmware)
UDEV  [1198809154.185119] remove   /class/firmware/4-4 (firmware)
UDEV  [1198809154.189567] add      /class/firmware/4-4 (firmware)
UEVENT[1198809154.190602] remove   /class/firmware/4-4 (firmware)
UDEV  [1198809154.193075] remove   /class/firmware/4-4 (firmware)
UDEV  [1198809154.194371] add      /class/firmware/4-4 (firmware)
UEVENT[1198809154.202620] add      /class/firmware/4-4 (firmware)
UEVENT[1198809154.206762] remove   /class/firmware/4-4 (firmware)
UDEV  [1198809154.209653] remove   /class/firmware/4-4 (firmware)
UDEV  [1198809154.210995] add      /class/firmware/4-4 (firmware)
UEVENT[1198809154.215979] remove   /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UEVENT[1198809154.216609] remove   /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UEVENT[1198809154.216965] remove   /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UEVENT[1198809154.217370] remove   /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UEVENT[1198809154.217524] add      /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UEVENT[1198809154.217893] add      /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UEVENT[1198809154.218028] add      /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UEVENT[1198809154.218390] add      /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UDEV  [1198809154.247635] remove   /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UDEV  [1198809154.250907] remove   /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UDEV  [1198809154.254096] remove   /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UDEV  [1198809154.257055] remove   /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UDEV  [1198809154.261374] add      /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UDEV  [1198809154.263926] add      /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UDEV  [1198809154.266833] add      /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UDEV  [1198809154.269387] add      /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UEVENT[1198809154.481643] remove   /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UEVENT[1198809154.481989] remove   /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UEVENT[1198809154.482131] remove   /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UEVENT[1198809154.482257] remove   /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UEVENT[1198809154.482385] add      /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UEVENT[1198809154.482510] add      /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UEVENT[1198809154.482636] add      /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UEVENT[1198809154.482760] add      /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UEVENT[1198809154.482886] add      /class/usb_device/usbdev4.5 (usb_device)
UDEV  [1198809154.488307] remove   /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UDEV  [1198809154.491278] remove   /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UDEV  [1198809154.494353] remove   /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UDEV  [1198809154.497317] remove   /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UDEV  [1198809154.507784] add      /class/usb_endpoint/usbdev4.5_ep01 (usb_endpoint)
UDEV  [1198809154.510353] add      /class/usb_endpoint/usbdev4.5_ep82 (usb_endpoint)
UDEV  [1198809154.512902] add      /class/usb_endpoint/usbdev4.5_ep83 (usb_endpoint)
UDEV  [1198809154.515451] add      /class/usb_endpoint/usbdev4.5_ep04 (usb_endpoint)
UDEV  [1198809154.559184] add      /class/usb_device/usbdev4.5 (usb_device)