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Re: Still unable to restart networking on Debian 9 text mode only




Additional information - Again Debian 9.6 Fresh Install without
graphical interface:

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

# The primary network interface
allow-hotplug enp0s3
iface enp0s3 inet static
    address 10.5.0.2/24
    gateway 10.5.0.1
    # dns-* options are implemented by the resolvconf package, if installed
    dns-nameservers 8.8.8.8
    dns-search neoconsig.local

Just changed 10.5.0.2 to 10.5.0.3

#ifdown enp0s3
#ifup enp0s3


Results in two ips configured instead of changing it:

#ip a
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP group default qlen 1000
    link/ether 08:00:27:7a:16:16 brd ff:ff:ff:ff:ff:ff
    inet 10.5.0.2/24 brd 10.5.0.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet 10.5.0.3/24 brd 10.5.0.255 scope global secondary enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe7a:1616/64 scope link
       valid_lft forever preferred_lft forever


Now lets restart the system and try it again but now using systemctl
restart networking:

After the full reboot the ip changed to 10.5.0.3, respecting
/etc/network/interfaces.

So, Lets try to change it again from 10.5.0.3 to 10.5.0.2

#systemctl restart networking
(connection just disconnected instead of changing the ip)
#ping 8.8.8.8
(eternally waiting...)
#ip address
Still shows the correct information (the ip did not change)


Em sex, 23 de nov de 2018 às 11:10, Luciano Andress Martini
<analistaunix@xxxxxxxxx> escreveu:
>
> If i am phisically logged the behavior are like to be the same.
> Em sex, 23 de nov de 2018 às 11:09, Luciano Andress Martini
> <analistaunix@xxxxxxxxx> escreveu:
> >
> > Thank you Greg i would not like to use NetworkManager, i just tried it
> > because all the other ways that i tried did not worked in new Debian
> > Versions, after a fresh install so i am searching for a correct way of
> > doing things.. (i read documentation, but maybe i am missing
> > something)
> >
> > ifdown and ifup work partially instead of changing the ip, and it is
> > adding a new ip to the interface.
> >
> > service networking restart - just brokes the network connection.
> > Em sex, 23 de nov de 2018 às 11:02, Greg Wooledge
> > <wooledg@xxxxxxxxxxx> escreveu:
> > >
> > > On Fri, Nov 23, 2018 at 10:31:28AM -0200, Luciano Andress Martini wrote:
> > > > Then I edited /etc/network/interfaces and restart the system, to see
> > > > if the ip was changed. And yes, it worked. So this file is still being
> > > > used in some way - humm that seems to be the correct place to
> > > > configure my interface isn't?
> > >
> > > /etc/network/interfaces is the primary, supported means of configuring
> > > network interfaces in Debian.  It's the best choice for standard server
> > > and workstation setups.
> > >
> > > Network-Manager may also be installed (it's optional).  As you've already
> > > seen, it is installed when choosing a "desktop environment" during the
> > > Debian installation, and skipped if no DE is chosen.  N-M is apparently
> > > the tool of choice for configuring wireless interfaces on laptops.
> > >
> > > Interfaces that are configured in /e/n/i are skipped by N-M.  Thus,
> > > you could think of it as "/e/n/i has priority, and N-M gets whatever
> > > /e/n/i didn't get".
> > >
> > > Then there's some bizarre systemd network interface thing.  It's not
> > > used by default in Debian.  I can't imagine anyone ever using it.
> > > You can simply ignore it.
> > >
> >
> >
> > --
> > Luciano Andress Martini - Analista UNIX
>
>
>
> --
> Luciano Andress Martini - Analista UNIX



--
Luciano Andress Martini - Analista UNIX