On Tue, Aug 14, 2018 at 12:05:34AM -0700, Remigio wrote: > recently I installed Debian 9 Stretch [...] > Could you help me please to understand where are network configuration files > and how to manage them?
If, during the installation, you choose to install a Desktop Environment, then Network Manager gets installed, and the configuration that would normally go into /etc/network/interfaces (/e/n/i for short) is wiped out. With your ethernet and/or wifi interfaces not listed in /e/n/i, NM takes over and manages those interfaces. For better or worse. If, on the other hand, during the installation, you choose NOT to install a Desktop Environment, then the installer writes the network configuration stuff into /e/n/i for you, and NM is not installed. On Tue, Aug 14, 2018 at 10:05:47AM +0100, Brian wrote: > apt purge network-manager > apt --purge autoremove > > Then configure /e/n/i to your liking. I second this recommendation for a desktop machine or a server. I don't know about laptops.