System administration command. List all Universal Serial Bus (USB) devices. This command has many options of use for debugging device drivers. Here we document some of the more common options.
Show IRQ and addresses as seen by the cards instead of the kernel.
Only show information about the specified device. This should be given as a file in the /proc/bus/usb directory--e.g., /proc/bus/usb/001/001.
Print a tree showing connections between devices.
List devices verbosely. Use the second form for very verbose listings.