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Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong configuration, on debian stable

From Greg Wooledge <greg@wooledge.org>
Newsgroups linux.debian.user
Subject Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong configuration, on debian stable
Date 2023-03-02 14:20 +0100
Message-ID <G4R0K-9yMY-9@gated-at.bofh.it> (permalink)
References (5 earlier) <G4E3v-9q0B-1@gated-at.bofh.it> <G4NzP-9w9K-3@gated-at.bofh.it> <G4Qo1-9yiL-3@gated-at.bofh.it> <G4QxH-9ymn-1@gated-at.bofh.it> <G4QR3-9yJb-5@gated-at.bofh.it>
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On Thu, Mar 02, 2023 at 02:01:57PM +0100, davenull@tuxfamily.org wrote:

> > > > akb@akira:~$ LC_ALL=C aptitude why ifupdown
> > > > p   netscript-2.4 Provides ifupdown
> > > > p   netscript-2.4 Depends  bridge-utils (>= 0.9.3)
> > > > p   bridge-utils  Suggests ifupdown
> > > > akb@akira:~$ LC_ALL=C aptitude why netscript-2.4
> > > > p   netscript-2.4 Provides ifupdown

> dpkg -l netscript-2.4 or even dpkg -l | grep netscript
> 
> Don't return anything… Not sure why "aptitude why ifupdown" mentions
> netscript-2.4 at all

Oh, that's reassuring.  And also confusing.

Man, I really wish the aptitude(8) man page would explain how to read
the output of "why".  What does the "p" mean?  Purged?  There's nothing
in the man page that explains the symbols in the first 3 columns, as
far as I can find.

I have *no* idea how to interpret this:

unicorn:~$ aptitude why ifupdown
p   netscript-2.4 Provides ifupdown               
p   netscript-2.4 Depends  bridge-utils (>= 0.9.3)
p   bridge-utils  Suggests ifupdown               
unicorn:~$ dpkg -l ifupdown | tail -n1
ii  ifupdown       0.8.36       amd64        high level tools to configure network interfaces

Maybe "aptitude why" simply can't handle packages that are part of
the base system ("Essential", or priority "required" or "important"),
or which have been manually installed and aren't part of a dependency...?

unicorn:~$ aptitude why bash
i   bash-builtins Depends bash (= 5.1-2+deb11u1)
unicorn:~$ aptitude why dpkg
i   google-chrome-stable PreDepends dpkg (>= 1.14.0)
unicorn:~$ aptitude why abcde
Manually installed, current version 2.9.3-1, priority optional
No dependencies require to install abcde

OK, I guess it handles manually installed packages.  But not base
system packages... at least not in a way one would expect.

In any case, ifupdown is an "important" package, and should be present
on almost all Debian systems, regardless of what "aptitude why" says
about it.

unicorn:~$ dpkg -s ifupdown | grep Prio
Priority: important

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Thread

Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-22 18:20 +0100
  Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Roberto C. Sánchez <roberto@debian.org> - 2023-02-22 18:30 +0100
  Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Christoph Brinkhaus <c.brinkhaus@t-online.de> - 2023-02-22 18:40 +0100
    Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-23 11:40 +0100
      Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Reco <recoverym4n@enotuniq.net> - 2023-02-23 18:20 +0100
  Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Greg Wooledge <greg@wooledge.org> - 2023-02-22 19:30 +0100
  Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable David Wright <deblis@lionunicorn.co.uk> - 2023-02-22 22:10 +0100
    Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-23 10:50 +0100
      Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable <tomas@tuxteam.de> - 2023-02-23 11:00 +0100
        Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-23 11:40 +0100
      Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable David Wright <deblis@lionunicorn.co.uk> - 2023-02-24 06:40 +0100
        Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable <tomas@tuxteam.de> - 2023-02-24 06:50 +0100
        Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-24 10:30 +0100
          Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable <tomas@tuxteam.de> - 2023-02-24 10:30 +0100
            Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-24 11:30 +0100
              Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable tomas@tuxteam.de - 2023-02-24 11:50 +0100
              Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-27 15:20 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Greg Wooledge <greg@wooledge.org> - 2023-02-27 15:40 +0100
          Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Greg Wooledge <greg@wooledge.org> - 2023-02-24 13:30 +0100
          Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable David Wright <deblis@lionunicorn.co.uk> - 2023-02-25 01:30 +0100
          Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-02 11:50 +0100
            Re: Forcing dhclient to not ignore tun0 interface when it's  available Tim Woodall <debianuser@woodall.me.uk> - 2023-03-03 04:10 +0100
              Re: Forcing dhclient to not ignore tun0 interface when it's available Max Nikulin <manikulin@gmail.com> - 2023-03-03 06:30 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's  available Tim Woodall <debianuser@woodall.me.uk> - 2023-03-03 07:40 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available Max Nikulin <manikulin@gmail.com> - 2023-03-03 16:10 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available David Wright <deblis@lionunicorn.co.uk> - 2023-03-03 16:20 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-06 13:40 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available David Wright <deblis@lionunicorn.co.uk> - 2023-03-07 05:10 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-07 17:20 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available David Wright <deblis@lionunicorn.co.uk> - 2023-03-10 02:00 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-06 13:20 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available David Wright <deblis@lionunicorn.co.uk> - 2023-03-07 05:10 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-07 17:00 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available Max Nikulin <manikulin@gmail.com> - 2023-03-07 16:30 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-07 18:00 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available David Wright <deblis@lionunicorn.co.uk> - 2023-03-10 02:00 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-10 09:50 +0100
            Re: Forcing dhclient to not ignore tun0 interface when it's available David Wright <deblis@lionunicorn.co.uk> - 2023-03-03 06:30 +0100
              Re: Forcing dhclient to not ignore tun0 interface when it's available davenull@tuxfamily.org - 2023-03-03 18:10 +0100
                Re: Forcing dhclient to not ignore tun0 interface when it's available David Wright <deblis@lionunicorn.co.uk> - 2023-03-04 18:40 +0100
  Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable Cindy Sue Causey <butterflybytes@gmail.com> - 2023-02-23 02:30 +0100
    Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong configuration, on debian stable conover@panix.com (John Conover) - 2023-02-23 03:20 +0100
      Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-23 11:30 +0100
        Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable Jeremy Ardley <jeremy@ardley.org> - 2023-02-23 11:40 +0100
        Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable David Wright <deblis@lionunicorn.co.uk> - 2023-02-28 05:30 +0100
          Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-02-28 16:10 +0100
            Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Tixy <tixy@yxit.co.uk> - 2023-02-28 17:00 +0100
            Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable David Wright <deblis@lionunicorn.co.uk> - 2023-03-02 00:30 +0100
              Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-03-02 10:40 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Greg Wooledge <greg@wooledge.org> - 2023-03-02 13:40 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-03-02 13:50 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-03-02 14:10 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Greg Wooledge <greg@wooledge.org> - 2023-03-02 14:20 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable davenull@tuxfamily.org - 2023-03-02 16:20 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable David <bouncingcats@gmail.com> - 2023-03-02 16:40 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with wrong  configuration, on debian stable David <bouncingcats@gmail.com> - 2023-03-02 16:20 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable Curt <curty@free.fr> - 2023-03-02 18:30 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable David Wright <deblis@lionunicorn.co.uk> - 2023-03-02 19:20 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable <tomas@tuxteam.de> - 2023-03-02 20:30 +0100
                Re: Debugging what is deleting/recreating /etc/resolv.conf with  wrong configuration, on debian stable David Wright <deblis@lionunicorn.co.uk> - 2023-03-03 06:20 +0100

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