Install libconfig-onion-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libconfig-onion-perl
Description:
layered configuration
Config::Onion stores all configuration settings in four layers: Defaults, Main, Local, and Override. Each layer can be added to as many times as you like. Within each layer, settings which are given multiple times will take the last specified value, while those which are not repeated will remain untouched.
Homepage: https://metacpan.org/release/Config-Onion
Version: 1.007-1
Section: universe/perl