Amadeus W.M. wrote:
This is degenerating in an off-topic discussion. The question is how to rename the network device back to eth0. Let's focus.
As a matter of interest, what happens if in /etc/sysconfig/network-scripts you write ifcfg-enp2s0, say, as DEVICE=eth1 TYPE=Ethernet ... ? I did this by mistake and the interface seemed to be called eth1, in some places at least. I changed it when I saw my mistake, so I don't know how it would have worked. (I'm running the network service on my server, not NM.)