I know newer Ubuntu are using Netplan to manage the network and it will replace the traditional /etc/network/interfaces
way of network configuration.
I have to configure some Ubuntu machines this week and I wanted to know if my old /etc/network/interfaces
configuration files in these new Ubuntu machines will work. I mean: if I configure the /etc/network/interfaces
file properly... will it work properly or is Ubuntu going to ignore it because it is prepared to use Netplan?
Netplan will replace the old /etc/network/interfaces, that means this file will not used anymore by default. But you can still use this file if required by installing the package ifupdown.
This package is the service responsible to configure the network interfaces from /etc/network/interfaces.