Re: OpenSMTPD won't start as part of systemd

["Paul M. Foster" <paulf@quillandmouse.com>]

On 10/28/21 9:59 PM, Greg Wooledge wrote:
> On Thu, Oct 28, 2021 at 09:34:26PM -0400, Paul M. Foster wrote:
> > Well, that's interesting. Here is my /etc/network/interfaces:
> >
> > ===
> >
> > source /etc/network/interfaces.d/*
> >
> >
> > # The loopback network interface
> >
> > auto lo
> >
> > iface lo inet loopback
> >
> > ===
> >
> > There's nothing in /etc/network/interfaces.d/ . This is a stock Debian 11
> > install, so whatever's in this file hasn't been messed with. No mention of
> > eno1. However, it DOES come up. Any clues?
> There's no such thing as a "stock install".  There are many possible
> installs, depending on which choices you make during the installation.
>
> If your interface isn't defined in /e/n/i then the most likely place
> it's being brought up is in Network-Manager.  If it's not N-M then
> perhaps someone has configured your system to use systemd-networkd,
> but that's not enabled by default in Debian, so it's far less common.

How about "/etc/NetworkManager/system-connections/Wired connection 1" 
(who comes up with these Windows filenames?):

===

[connection]
id=Wired connection 1
uuid=7bb23b3a-c750-4c65-ae82-164f7359ea7d
type=802-3-ethernet

[802-3-ethernet]

[ipv4]
method=auto

[ipv6]
method=auto
ip6-privacy=2

===

"Stock install" in this case means I just let the installer set up the 
networking, etc. Since eno1 is the wired connection, I assume this is 
where it gets set up. However, this doesn't really answer the question 
of why eno1 apparently not ready when OpenSMTPd wants to start.

Paul