No USB0 for ethernet/serial comms

Ive been working on a cape for my beagle bone and wanted to be able to send commands over the USB using either the serial or TCP but I could never get the USB ethernet to work,

I am running a ubuntu image to boot to the sdcard, that carries a debian distro.
If i try if config i get eth0 and lo but no usb0.
I looked in the /dev and there is no usb0 and no change if i unplug the usb cable.