[Solved] Eth0 missing from the VM on Virtualbox
You clone a working VM and when you boot, you find that it does not have the Eth0 adapter although the settings does show that the adapter is active.
To resolve this issue, boot the VM and go to the /etc/udev/rules.d folder
Rename or delete the file 70-persistent-net.rules and reboot
The adapter is recreated and you VM can now have internet access
This is tested on Debian based systems