When I make a clone of my SD, the resulting image has ethernet problems

Question

First of all, I'm working with Ubuntu Server 18.04, on a Raspberry Pi 3b+.

I'm running a server with Nodejs and MongoDB. Everything works perfect. The problem comes when I want to clone the SD into another, in order to not have to repeat all the process in the new SD. However, when I do it, the clone (new) system has ethernet problems. For example, when I do

ifconfig

eth0 does not appear, unlike in the original image. For what I've read, it seems to be a problem with the MAC address, but I don't know how to solve it. Is there any way to make a clone in a proper way without losing the ethernet connection? Thanks

Answer 1

In your netplan folder try deleting or commenting in your .yaml file the lines related to the MAC info:

network:
    version: 2
    ethernets:
        eth0:
            addresses: [yourIP/24]            
            gateway4: yourGateway
        match:  #Comment or delete
            macaddress: yourMacAddress #Comment or delete
        set-name: yourNetName  #Comment or delete

Apply your netplan with sudo netplan apply make a reboot and check ifconfig.