Re: Return a Debian system to a pristine state

From	David Wright <deblis@lionunicorn.co.uk>
Newsgroups	linux.debian.user
Subject	Re: Return a Debian system to a pristine state
Date	2020-07-02 03:10 +0200
Message-ID	<AnVTH-8cB-1@gated-at.bofh.it> (permalink)
References	(2 earlier) <AcAfU-5qF-1@gated-at.bofh.it> <AdZcf-7GD-33@gated-at.bofh.it> <AeDjk-ZQ-7@gated-at.bofh.it> <AfvMJ-7h-5@gated-at.bofh.it> <AfFCp-6h6-1@gated-at.bofh.it>
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On Tue 09 Jun 2020 at 09:03:34 (+0300), Andrei POPESCU wrote:
> On Lu, 08 iun 20, 14:32:29, David Wright wrote:
> > 
> > I was impressed by apt-get's performance, probably because of dim
> > memories of how dpkg would react on being asked to install ~2000
> > packages at once. The latter doesn't have the logic for sorting
> > operations into a sequence that preserves an unbroken system.
> 
> It's unclear to me what you meant by that.

Perhaps I can clarify. Just as an experiment, I took a
buster system that had a minimal installation of tasks
"ssh server" and "standard utilities", plus:
etckeeper git git-man patch rsync sudo apt-show-versions aptitude.

I ran the attached file simultaneously requesting 271 packages, and
thereby installing 1558. Everything was installed and configured correctly.
I then reran the attached file but edited: install → purge,
followed by   apt-get --purge autoremove   a couple of times.
After all this, I was back at the original 350 packages that were
present before I ran the attachment. Again, no problem.

> Unless you use one of the --force options (at your own risk, of course) 
> dpkg will refuse actions that go against (Pre-)Depends, Conflicts and 
> Breaks.
> 
> The difference between dpkg and apt in this regard is that dpkg acts 
> only on the set of packages it was provided.

Having cleared the cache before I started the above, I now had the
1558 .deb files sitting in the cache, so to reinstall them I ran
# dpkg -i -R -E /var/cache/apt/archives/.
At the end of that process, the final messages from dpkg were:

  Errors were encountered while processing:
   /var/cache/apt/archives//fvwm-icons_20070101-4_all.deb
   /var/cache/apt/archives//gawk_1%3a4.2.1+dfsg-1_i386.deb
   /var/cache/apt/archives//libmotif-common_2.3.8-2_all.deb
   /var/cache/apt/archives//libxm4_2.3.8-2_i386.deb
   /var/cache/apt/archives//lilypond_2.19.81+really-2.18.2-13_i386.deb
   /var/cache/apt/archives//ntfs-3g_1%3a2017.3.23AR.3-3_i386.deb
   boot-info-script
   fig2dev
   testdisk
   xpdf

Respectively, the 10 errors were: pre-dependency (4 off),
file missing during pre-install, pre-dependency,
gawk missing (2 off), ntfs-3g missing, libxm4 missing.

In addition, this error message occurred during the run:
  systemctl preset failed on ModemManager.service: No such file or directory
There was no problem setting up modemmanager when I was using apt-get.

>     User: dpkg, remove this package
>     dpkg: nope, this will break these other packages
>     User: apt, remove this package
>     apt: sure, in addition these other packages must be removed because 
>     they depend on it
>     User: ok, go ahead
>     apt: dpkg, remove this set of packages
>     dpkg: sure, done
> 
>     User: dpkg, install this package
>     dpkg: nope, it depends on these other packages that are neither 
>     installed nor were provided at the same time
>     User: apt, install this package
>     apt: sure, in addition these other packages must be downloaded and 
>     installed to fulfill dependencies (and recommendations)
>     User: whatever, do it already
>     apt: ok, downloading... done
>     apt: dpkg, install this set of packages
>     dpkg: sure, done

So—the "dim memories": Years ago, when I had to install duplicate
systems on several machines, I would capture the cache from the first
installation on a 1GB Jaz drive, and use it to install the others.
(My systems were considerably smaller then.)

One useful command when doing this was    dpkg --configure -a
whenever dpkg got jammed up, followed by repeating the   dpkg -i
command (which explains using -E above).

Cheers,
David.

Thread

Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-27 10:50 +0200
  Re: Return a Debian system to a pristine state Dan Ritter <dsr@randomstring.org> - 2020-05-27 15:50 +0200
    Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 07:20 +0200
      Re: Return a Debian system to a pristine state Greg Wooledge <wooledg@eeg.ccf.org> - 2020-05-28 13:50 +0200
        Re: Return a Debian system to a pristine state The Wanderer <wanderer@fastmail.fm> - 2020-05-28 14:10 +0200
          Re: Return a Debian system to a pristine state Greg Wooledge <wooledg@eeg.ccf.org> - 2020-05-28 15:00 +0200
            Re: Return a Debian system to a pristine state The Wanderer <wanderer@fastmail.fm> - 2020-05-28 15:10 +0200
          Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 16:20 +0200
        Re: Return a Debian system to a pristine state Kenneth Parker <sea7kenp@gmail.com> - 2020-05-28 14:50 +0200
        Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 16:00 +0200
          Re: Return a Debian system to a pristine state Greg Wooledge <wooledg@eeg.ccf.org> - 2020-05-28 16:10 +0200
            Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 16:40 +0200
              Re: Return a Debian system to a pristine state Greg Wooledge <wooledg@eeg.ccf.org> - 2020-05-28 16:50 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-29 17:20 +0200
              Re: Return a Debian system to a pristine state John Hasler <jhasler@newsguy.com> - 2020-05-28 18:00 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-05-29 09:50 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-29 16:40 +0200
                Re: Return a Debian system to a pristine state Miles Fidelman <mfidelman@meetinghouse.net> - 2020-05-29 16:50 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-29 17:20 +0200
                Re: Return a Debian system to a pristine state John Hasler <jhasler@newsguy.com> - 2020-05-29 17:40 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-30 06:00 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-05-30 07:10 +0200
                Re: Return a Debian system to a pristine state Tixy <tixy@yxit.co.uk> - 2020-05-30 11:30 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-05-30 14:40 +0200
                Re: Return a Debian system to a pristine state Tixy <tixy@yxit.co.uk> - 2020-05-30 19:40 +0200
              Re: Return a Debian system to a pristine state Miles Fidelman <mfidelman@meetinghouse.net> - 2020-05-28 18:00 +0200
          Re: Return a Debian system to a pristine state <tomas@tuxteam.de> - 2020-05-28 16:40 +0200
          Re: Return a Debian system to a pristine state Eduardo M KALINOWSKI <eduardo@kalinowski.com.br> - 2020-05-28 17:10 +0200
          Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-05-28 17:10 +0200
            Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-29 17:00 +0200
              Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-05-29 21:50 +0200
                Re: Return a Debian system to a pristine state Marco Möller <talby@debianlists.mobilxpress.net> - 2020-05-29 22:30 +0200
                Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-05-30 05:10 +0200
                Re: Return a Debian system to a pristine state Marco Möller <talby@debianlists.mobilxpress.net> - 2020-05-30 20:00 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-01 08:10 +0200
                Re: Return a Debian system to a pristine state Marco Möller <talby@debianlists.mobilxpress.net> - 2020-06-01 12:30 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-01 20:00 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-31 11:30 +0200
                Re: Return a Debian system to a pristine state Joe <joe@jretrading.com> - 2020-05-31 13:40 +0200
                Re: Return a Debian system to a pristine state rhkramer@gmail.com - 2020-05-31 14:40 +0200
                Re: Return a Debian system to a pristine state l0f4r0@tuta.io - 2020-05-31 15:00 +0200
                Re: Return a Debian system to a pristine state The Wanderer <wanderer@fastmail.fm> - 2020-05-31 15:00 +0200
                Re: Return a Debian system to a pristine state Michael Howard <mike@dewberryfields.co.uk> - 2020-05-31 15:10 +0200
                Re: Return a Debian system to a pristine state "Thomas Schmitt" <scdbackup@gmx.net> - 2020-05-31 17:00 +0200
                Re: Return a Debian system to a pristine state Dan Ritter <dsr@randomstring.org> - 2020-05-31 17:40 +0200
                Re: Return a Debian system to a pristine state "Thomas Schmitt" <scdbackup@gmx.net> - 2020-05-31 21:00 +0200
                Re: Return a Debian system to a pristine state Michael Howard <mike@dewberryfields.co.uk> - 2020-05-31 19:50 +0200
                Re: Return a Debian system to a pristine state rhkramer@gmail.com - 2020-05-31 22:00 +0200
                Re: Return a Debian system to a pristine state Michael Howard <mike@dewberryfields.co.uk> - 2020-05-31 23:40 +0200
                Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-06-04 16:40 +0200
                Re: Return a Debian system to a pristine state John Hasler <jhasler@newsguy.com> - 2020-06-04 22:50 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-06-05 17:40 +0200
                Re: Return a Debian system to a pristine state The Wanderer <wanderer@fastmail.fm> - 2020-06-05 18:10 +0200
                Re: Return a Debian system to a pristine state Brian <ad44@cityscape.co.uk> - 2020-06-06 12:30 +0200
                Re: Return a Debian system to a pristine state The Wanderer <wanderer@fastmail.fm> - 2020-06-06 13:00 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-06-07 14:00 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-06 11:30 +0200
                Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-06-08 21:40 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-09 08:10 +0200
                Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-07-02 03:10 +0200
                Re: Return a Debian system to a pristine state Tom Dial <tddial@comcast.net> - 2020-06-01 05:10 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-01 08:30 +0200
                Re: Return a Debian system to a pristine state Tom Dial <tddial@comcast.net> - 2020-06-02 00:40 +0200
                Re: Return a Debian system to a pristine state Marco Möller <talby@debianlists.mobilxpress.net> - 2020-06-01 11:50 +0200
                Re: Return a Debian system to a pristine state "Sijmen J. Mulder" <ik@sjmulder.nl> - 2020-06-04 10:50 +0200
                Re: Return a Debian system to a pristine state Tom Dial <tddial@comcast.net> - 2020-06-04 21:20 +0200
                Re: Return a Debian system to a pristine state songbird <songbird@anthive.com> - 2020-06-01 13:30 +0200
                Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-06-01 20:30 +0200
                Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-06-02 06:10 +0200
                Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-02 07:30 +0200
                Re: Return a Debian system to a pristine state Dan Ritter <dsr@randomstring.org> - 2020-06-02 14:40 +0200
                Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-06-02 17:10 +0200
                Re: Override default post-install starting of services [was Return  a Debian system to a pristine state] davidson <davidson@freevolt.org> - 2020-07-05 22:20 +0200
                Re: Override default post-install starting of services [was Return a  Debian system to a pristine state] David Wright <deblis@lionunicorn.co.uk> - 2020-07-05 23:40 +0200
      Re: Return a Debian system to a pristine state Dan Ritter <dsr@randomstring.org> - 2020-05-28 14:10 +0200
      Re: Return a Debian system to a pristine state Miles Fidelman <mfidelman@meetinghouse.net> - 2020-05-28 16:40 +0200
        Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 16:50 +0200
  Re: Return a Debian system to a pristine state songbird <songbird@anthive.com> - 2020-05-27 16:10 +0200
    Re: Return a Debian system to a pristine state Greg Wooledge <wooledg@eeg.ccf.org> - 2020-05-27 16:30 +0200
      Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 07:40 +0200
        Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-05-28 08:10 +0200
    Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 07:30 +0200
  Re: Return a Debian system to a pristine state Charles Curley <charlescurley@charlescurley.com> - 2020-05-27 20:10 +0200
    Re: Return a Debian system to a pristine state Victor Sudakov <vas@sibptus.ru> - 2020-05-28 07:40 +0200
  Re: Return a Debian system to a pristine state "Sijmen J. Mulder" <ik@sjmulder.nl> - 2020-05-28 11:20 +0200
    Re: Return a Debian system to a pristine state <tomas@tuxteam.de> - 2020-05-28 11:30 +0200
  Re: Return a Debian system to a pristine state emetib <chadbrabec@gmail.com> - 2020-06-01 05:10 +0200
    Re: Return a Debian system to a pristine state Marco Möller <talby@debianlists.mobilxpress.net> - 2020-06-01 12:20 +0200
      Re: Return a Debian system to a pristine state songbird <songbird@anthive.com> - 2020-06-01 13:30 +0200
      Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-06-04 16:40 +0200
        Re: Return a Debian system to a pristine state The Wanderer <wanderer@fastmail.fm> - 2020-06-04 21:50 +0200
          Re: Return a Debian system to a pristine state Marco Möller <talby@debianlists.mobilxpress.net> - 2020-06-05 13:10 +0200
            Re: Return a Debian system to a pristine state Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-06 11:40 +0200
              Re: Return a Debian system to a pristine state David Wright <deblis@lionunicorn.co.uk> - 2020-06-08 21:40 +0200

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