Snakeoil ISO File Version 0.1.4 (Cryo Treatment)

[agent_kith]

Maybe something with a new kernel being used?
This is the result of dmesg | grep eth0

e1000e 0000:00:19.0 eth0: registered PHC clock
e1000e 0000:00:19.0 eth0: (PCI Express :2.5GT/s:Width x1) xx:xx:xx:xx:xx:xx (=MAC address)
e1000e 0000:00:19.0 eth0: Intel® PRO/1000 Network Connection
e1000e 0000:00:19.0 eth0: MAC: 11, PHY: 12, PBA No: FFFFFF-0FF
e1000e 0000:00:19.0 eth0: em1: renamed from eth0
systemd-udevd[2750]: renamed network interface eth0 to em1

try and update /etc/nework/interfaces to the following
 

Code:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto em1
iface em1 inet dhcp

i.e. replace eth0 to em1, then reboot and see if that works.

This Ubuntu udev "feature" of renaming network interface names is really starting to get frustrating . And this renaming didn't happen in my test setup, and why I missed it .