Re: debian 9 network configuration

[john doe <johndoe65534@mail.com>]

On 8/14/2018 10:39 AM, Remigio wrote:
> Il giorno martedì 14 agosto 2018 10:20:04 UTC+2, john doe ha scritto:
> > On 8/14/2018 9:05 AM, Remigio wrote:
> > > Hi there,
> > > recently I installed Debian 9 Stretch and I noticed that the network configuration management method was substantially changed.
> > > Infact the file /etc/network/interfaces is almost empty despite I've inserted the network parameters during the installation process and network works now.
> > > I tried searching on the web about this topic but I found lots of different answers.
> > > Could you help me please to understand where are network configuration files and how to manage them?
> > > Thank you so much
> > > Regards
> >
> > If your '/etc/network/interfaces' is empty with the exception of the lo
> > interface, it is most likely that your interfaces are configured by an
> > other software (NetworkManager, (NM), WICD, systemd-networkd ...).
> >
> > What is the content of '/etc/resolv.conf'?:
> >
> > $ cat /etc/resolv.conf
> >
> > --
> > John Doe
>
> Hi John, :-)
>
> root@debian:~# cat /etc/network/interfaces
> # This file describes the network interfaces available on your system
> # and how to activate them. For more information, see interfaces(5).
>
> source /etc/network/interfaces.d/*
>
> # The loopback network interface
> auto lo
> iface lo inet loopback

Looks good when using NM.

> and
>
> root@debian:~# cat /etc/resolv.conf
> # Generated by NetworkManager
> nameserver 10.30.10.140

In addition to the other answers you could also configure NetworkManager:

https://developer.gnome.org/NetworkManager/stable/NetworkManager.conf.html

Uninstalling a program is never an option you need to understand how 
that program works! :)
In the case of NM it's easier to use the front end but it is always nice 
to go command line or using config files  when needed.

--
John Doe