setup usb headless
cmdline.txt: add 'modules-load=dwc2,g_ether' before 'rootwait'
config.txt: add 'dtoverlay=dwc2,dr_mode=peripheral'
sudo nano /etc/network/interfaces
allow-hotplug usb0 iface usb0 inet static address 192.168.7.2 netmask 255.255.255.0 network 192.168.7.0 broadcast 192.168.7.255 gateway 192.168.7.1