(RaspberryPi2)ubuntu@localhost:~$ sudo ifconfig eth0 up
usbnet: failed control transaction: request 0x2143 value 0xe index 0x0 length 0x0
usbnet: failed control transaction: request 0x2143 value 0xe index 0x0 length 0x0
(RaspberryPi2)ubuntu@localhost:~$ ping 4.2.2.1
connect: Network is unreachable