08-30-2020, 04:09 PM
This all sounds odd may be there's an explanation. Instead of eth0, your systems may have all reverted to Predictable Network Interface Names this is a departure from naming schemes that included eth0. If you run ifconfig you can see a list of network interfaces available to your systems.
What's your condition or description for "cannot find ethernet hardware"?
What's your condition or description for "cannot find ethernet hardware"?