Fix eth not found in ubuntu server in VMServer

1. make sure network adapter added to VM.

2. "ifconfig -a " to show all adapter.

3. "sudo ifconfig ethX up " to start up the adapter.

4. "dhclient ethX" to get an ip from HDCP Server.

ref:
http://www.linuxquestions.org/questions/linux-networking-3/eth0-error-while-getting-interface-flags-no-such-device-using-kanotix-433175/
http://ubuntuforums.org/archive/index.php/t-456672.html