cloning VMs and imaging ubuntu break the networking. This has something to do with the MAC address changing, and the OS thinks there is a new eth device.cloning VMs and imaging ubuntu break the networking.

This has something to do with the MAC address changing, and the OS thinks there is a new eth device.The error I got was

sudo ifup eth0
Ignoring unknown interface eth0=eth0

sudo ifup eth1
Ignoring unknown interface eth1=eth1

I did a…

sudo mv /etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/70-persistent-net.rules.old.broken

sudo shutdown now -r

And the network was restored.

Update: damndest thing! My iBook’s MAC changed, for no apparent reason. I noticed that eth1 became eth2 and some other MAC specific things changed. I checked and old record and sure enough, the MAC changed. I performed the above steps to return eth2 to eth1. But that doesn’t explain how my MAC changed.

.