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Re: Where is data stored when Synaptic scans DVDs?

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On Sun 19 Mar 2017 at 08:50:55 (-0500), Richard Owlett wrote:
> On 03/19/2017 08:08 AM, David Wright wrote:
> >[snip ;]
> >
> >How's the other research coming along?
> >Did you see if there were files whose timestamps change?
> >Did you see whether you can find the files which are apparently
> >indexed in /var/lib/apt/cdroms.list?
> >And if/when you find them, what are you going to use them for,
> >in view of your new philosophy of working from the DVDs anyway?
> 
> It's not new. People just assumed that I would do things a certain
> way because that would be the way they would do it.
> I put effort into asking narrowly focused questions.

And I put effort into answering it as best I could.
The first answer to the thread may well be correct, but
you don't appear to have looked to see if it was correct.

I suggested /var/lib as another possibility, partly because
I think it would be easier to eliminate. All the files in
my /var/lib/apt are plain text, so it would be hard to hide
the information from scanned CDs.

OTOH /var/cache/apt contains a couple of .bin files which
have package names in them. Not having CDs to scan, I can't
test the file timestamp idea. If they changed, it would
suggest Jonathan was correct, but be trickier to prove.
Hence checking, and possibly eliminating, /var/lib.
Also there's the point that those .bin files may contain more
than just some CD indexes, so sharing them between different
systems would be high-risk.

So you haven't answered Jonathan's suggestion nor mine.
Instead, just some of the usual vague waffle about reading
lists, and complaints that the answers aren't good enough
for you.

I wrote to you privately in 2015 about this. Curt has just
written "it's obvious Dick Owlett is crowdsourcing his retirement",
but I think that ignores the fact that crowdsourcing should
involve reciprocal benefits.

> Many, in
> effect, say "Owlett can't mean ..." and proceed to answer "The
> question Owlett should have asked is ' ...? ' " ;}
> 

That's a legitimate course of action. In many cases, those
answers could be of use to many people reading this list,
particularly in view of the self-confessed statement that you
take "the road less traveled".

> >Or is it the 13 bookmarks added to your reading list that's the
> >only important thing?
> 
> For now. Those links provide the resources I need to answer a
> broader set of questions that this thread is just the tip of a
> proverbial iceberg.

As usual.

> The subject line is my question.
> Perhaps my original post gave too much information and should have
> been replaced by a single line quoting the subject line.
> 
> Perhaps the Subject/Body could have been phrased as
>     "Where is what data stored when Synaptic scans DVDs?"
> 
> Those 13 bookmarks will begin to answer that question.

I'm pessimistic about your making much progress with this
methodology. man apt-cdrom IMO is trying to put people off
from taking a simplistic approach, and the lack of documentation
of the whereabouts of the information is probably significant too.

But your reticence about revealing what you end up trying has
consequences. As I said, copying the DVDs was discussed many
months ago. "That has gone thru several variations, some mutually
inconsistent" is a response that's about par for the course.
I for one have lost interest.

Cheers,
David.

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Thread

Where is data stored when Synaptic scans DVDs? Richard Owlett <rowlett@cloud85.net> - 2017-03-17 14:50 +0100
  Re: Where is data stored when Synaptic scans DVDs? Jonathan Dowland <jmtd@debian.org> - 2017-03-17 15:30 +0100
  Re: Where is data stored when Synaptic scans DVDs? songbird <songbird@anthive.com> - 2017-03-17 17:20 +0100
    Re: Where is data stored when Synaptic scans DVDs? Richard Owlett <rowlett@cloud85.net> - 2017-03-17 21:40 +0100
      Re: Where is data stored when Synaptic scans DVDs? Brian <ad44@cityscape.co.uk> - 2017-03-17 22:00 +0100
        Re: Where is data stored when Synaptic scans DVDs? Richard Owlett <rowlett@cloud85.net> - 2017-03-17 23:30 +0100
        Re: Where is data stored when Synaptic scans DVDs? GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-18 18:40 +0100
          Re: Where is data stored when Synaptic scans DVDs? Brian <ad44@cityscape.co.uk> - 2017-03-18 19:00 +0100
            Re: Where is data stored when Synaptic scans DVDs? GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-18 20:30 +0100
              Re: Where is data stored when Synaptic scans DVDs? Brian <ad44@cityscape.co.uk> - 2017-03-19 00:20 +0100
                Re: Where is data stored when Synaptic scans DVDs? Richard Owlett <rowlett@cloud85.net> - 2017-03-19 12:40 +0100
                Re: Where is data stored when Synaptic scans DVDs? David Wright <deblis@lionunicorn.co.uk> - 2017-03-19 14:20 +0100
                Re: Where is data stored when Synaptic scans DVDs? Richard Owlett <rowlett@cloud85.net> - 2017-03-19 15:00 +0100
                Re: Where is data stored when Synaptic scans DVDs? David Wright <deblis@lionunicorn.co.uk> - 2017-03-20 05:30 +0100
                Re: Where is data stored when Synaptic scans DVDs? Brian <ad44@cityscape.co.uk> - 2017-03-21 00:10 +0100
                Re: Where is data stored when Synaptic scans DVDs? David Wright <deblis@lionunicorn.co.uk> - 2017-03-21 02:30 +0100
                Re: Where is data stored when Synaptic scans DVDs? Brian <ad44@cityscape.co.uk> - 2017-03-21 21:40 +0100
                Re: Where is data stored when Synaptic scans DVDs? Richard Owlett <rowlett@cloud85.net> - 2017-03-22 11:00 +0100
                Re: Where is data stored when Synaptic scans DVDs? Lisi Reisz <lisi.reisz@gmail.com> - 2017-03-21 03:30 +0100
                Re: Where is data stored when Synaptic scans DVDs? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-03-21 13:20 +0100
                Re: Where is data stored when Synaptic scans DVDs? Lisi Reisz <lisi.reisz@gmail.com> - 2017-03-25 13:00 +0100
          Re: Where is data stored when Synaptic scans DVDs? Curt <curty@free.fr> - 2017-03-18 19:10 +0100
      Re: Where is data stored when Synaptic scans DVDs? David Wright <deblis@lionunicorn.co.uk> - 2017-03-18 04:50 +0100
        Re: Where is data stored when Synaptic scans DVDs? Richard Owlett <rowlett@cloud85.net> - 2017-03-18 11:40 +0100
      Re: Where is data stored when Synaptic scans DVDs? songbird <songbird@anthive.com> - 2017-03-18 19:40 +0100
        Re: Where is data stored when Synaptic scans DVDs? deloptes <deloptes@gmail.com> - 2017-03-18 20:30 +0100
          Re: Where is data stored when Synaptic scans DVDs? songbird <songbird@anthive.com> - 2017-03-19 04:00 +0100
  Re: Where is data stored when Synaptic scans DVDs? Curt <curty@free.fr> - 2017-03-18 12:00 +0100
  An INCOMPLETE solution - was [Re: Where is data stored when Synaptic  scans DVDs?] Richard Owlett <rowlett@cloud85.net> - 2017-03-23 02:10 +0100
    Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Brian <ad44@cityscape.co.uk> - 2017-03-23 10:50 +0100
    Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Darac Marjal <mailinglist@darac.org.uk> - 2017-03-23 11:20 +0100
      Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Brian <ad44@cityscape.co.uk> - 2017-03-23 12:30 +0100
        Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] David Wright <deblis@lionunicorn.co.uk> - 2017-03-24 22:40 +0100
          Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Curt <curty@free.fr> - 2017-03-25 12:00 +0100
            Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] David Wright <deblis@lionunicorn.co.uk> - 2017-03-26 00:30 +0100
              Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Curt <curty@free.fr> - 2017-03-26 13:40 +0200
                Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] David Wright <deblis@lionunicorn.co.uk> - 2017-03-28 04:50 +0200
                Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Curt <curty@free.fr> - 2017-03-28 18:20 +0200
                Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] David Wright <deblis@lionunicorn.co.uk> - 2017-03-28 21:10 +0200
                Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Brian <ad44@cityscape.co.uk> - 2017-03-29 20:20 +0200
          Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Brian <ad44@cityscape.co.uk> - 2017-03-25 14:10 +0100
            Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] David Wright <deblis@lionunicorn.co.uk> - 2017-03-25 22:10 +0100
              Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Richard Owlett <rowlett@cloud85.net> - 2017-03-26 14:30 +0200
    Re: An INCOMPLETE solution - was [Re: Where is data stored when  Synaptic scans DVDs?] Brian <ad44@cityscape.co.uk> - 2017-03-24 19:40 +0100

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