Depending on the commmand described below, cme program will use Config::Model
configuration descriptions to check or modify or fix configuration files.

The 3rd parameter specify the application you want to work on. Most of the
time, the relevant configuration file(s) will be found by cme. This is the most
simple case. For instance:

sudo cme check popcon

Some application like multistrap have no constraint on the configuration file
name and will require you to specify your configuration file name:

cme check multistrap raspbian.conf