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Re: debian12: something destroys /etc/network/interfaces at boot

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On my Debian 12 system, the connman service was helping itself to interfaces, including my bridge interfaces that I wanted left alone.  Maybe try disabling or removing it?

sudo systemctl stop connman
sudo systemctl disable connman

Best

> On Mar 26, 2024, at 10:33, Steffen Dettmer <steffen.dettmer@gmail.com> wrote:
> 
> Hi,
> 
> I changed a gateway on a remote site using /etc/network/interfaces by
> changing gateway. However, at reboot some old gateway IP reappears. I
> really hate when some magic knows better than an explicitly set value.
> What happens here? How can I get rid of this? It is 100% reproducible.
> 
> I have no clue where the wrong 2.43 comes from.
> 
> Any hints appreciated!
> 
> Steffen
> 
> 
> root@site4-nas:~# ls -l /etc/network/interfaces
> -rw-r--r-- 1 root root 117 Mar 26 18:19 /etc/network/interfaces
> root@site4-nas:~# grep gateway /etc/network/interfaces
>        gateway 192.168.2.43
> root@site4-nas:~# perl -npi -e 's/gateway 192.168.2.43/gateway
> 192.168.2.1/' /etc/network/interface
>                                        s
> root@site4-nas:~# grep gateway /etc/network/interfaces
>                                                    gateway 192.168.2.1
> root@site4-nas:~# ls -l /etc/network/interfaces
> -rw-r--r-- 1 root root 116 Mar 26 18:21 /etc/network/interfaces
> root@site4-nas:~# sync
> root@site4-nas:~# date; sleep 1m; date
> Tue Mar 26 06:21:47 PM CET 2024
> Tue Mar 26 06:22:47 PM CET 2024
> root@site4-nas:~# ls -l /etc/network/interfaces
> -rw-r--r-- 1 root root 116 Mar 26 18:21 /etc/network/interfaces
> 
> OK, so gateway is correct in 18:21 timestamped user config file. Lets reboot.
> 
> root@site4-nas:~# reboot
> root@site4-nas:~# Connection to site4-nas closed by remote host.
> Connection to site4-nas closed.
> root@site4-pve:~# ssh site4-nas
> Linux site4-nas 6.5.11-8-pve #1 SMP PREEMPT_DYNAMIC PMX 6.5.11-8
> (2024-01-30T12:27Z) x86_64...
> Last login: Tue Mar 26 18:20:50 2024 from 192.168.2.28
> root@site4-nas:~# ls -l /etc/network/interfaces
> -rw-r--r-- 1 root root 117 Mar 26 18:23 /etc/network/interfaces
> root@site4-nas:~# grep gateway /etc/network/interfaces
>        gateway 192.168.2.43
> 
> root@site4-nas:~# find /etc /lib/systemd/ /var/lib/ -type f -print0 |
> xargs --null grep 192.168.2.43
> /etc/network/interfaces:        gateway 192.168.2.43
> 
> user config file has updated timestamp and contains bougous gateway.
> 
> Help please!
> 

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Thread

debian12: something destroys /etc/network/interfaces at boot Steffen Dettmer <steffen.dettmer@gmail.com> - 2024-03-26 18:40 +0100
  Re: debian12: something destroys /etc/network/interfaces at boot Dustin Jenkins <djenkins.cadc@gmail.com> - 2024-03-26 18:50 +0100
    Re: debian12: something destroys /etc/network/interfaces at boot Steffen Dettmer <steffen.dettmer@gmail.com> - 2024-03-27 00:30 +0100
  Re: debian12: something destroys /etc/network/interfaces at boot Greg Wooledge <greg@wooledge.org> - 2024-03-26 19:10 +0100
    Re: debian12: something destroys /etc/network/interfaces at boot Steffen Dettmer <steffen.dettmer@gmail.com> - 2024-03-27 00:30 +0100
  Re: debian12: something destroys /etc/network/interfaces at boot Pierre-Elliott Bécue <peb@debian.org> - 2024-03-26 19:20 +0100
    Re: debian12: something destroys /etc/network/interfaces at boot Steffen Dettmer <steffen.dettmer@gmail.com> - 2024-03-27 00:20 +0100
  Re: debian12: something destroys /etc/network/interfaces at boot Henning Follmann <hfollmann@itcfollmann.com> - 2024-03-26 20:10 +0100
    Re: debian12: something destroys /etc/network/interfaces at boot Steffen Dettmer <steffen.dettmer@gmail.com> - 2024-03-27 00:50 +0100
  Re: debian12: something destroys /etc/network/interfaces at boot Andy Smith <andy@strugglers.net> - 2024-03-26 20:30 +0100
    Re: debian12: something destroys /etc/network/interfaces at boot Steffen Dettmer <steffen.dettmer@gmail.com> - 2024-03-27 19:30 +0100

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