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Re: Bullseye - who and users return nothing

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On Tue 25 Jan 2022, at 13:11, Greg Wooledge <greg@wooledge.org> wrote:
> On Tue, Jan 25, 2022 at 01:06:42PM +0000, Gareth Evans wrote:
>> Just realised I gave contradicting info earlier - I said both that I upgraded from Buster (which is literally true) and that
>> 
>> "But for root on ZFS per 
>> 
>> https://openzfs.github.io/openzfs-docs/Getting%20Started/Debian/Debian%20Buster%20Root%20on%20ZFS.html (adjusted for Bullseye)  <<<<<<
>> 
>> ..."
>> 
>> which isn't, because Bullseye arrived via dist-upgrade, rather than a fresh installation.
>> 
>> My mistake may have prompted Andrei's suggestion which I then explained away partly in relation to having upgraded - sorry.
>
> I don't know anything about ZFS.  That said, it's *conceivable* that
> your / ownership has been broken this entire time, and you never noticed
> until now.  Either because you never ran "who", or because 

> systemd in
> buster didn't check the parent directory ownerships, but the one in
> bullseye does.

That's interesting.

FWIW, trying to get a timeframe...

My email re bullseye upgrade hiccups back in August

https://lists.debian.org/debian-user/2021/08/msg00979.html

indicates that I upgraded to Bullseye on 17th Aug 2021.  There were at most a few days of experimenting with restoring Buster snapshots and re-upgrading, but that was certainly done with by October, when QEMU logs show VM usage.   

I've never had to 

modprobe tun 

to start a VM before today, and Bash history shows who usage on 22/12/21.  Given this info and that the / ownership fix fixed both problems, I think that suggests a recent(ish) event as the cause.

>
> Food for thought.
>
> (It's not clear to me how setting up ZFS on / would involve your
> unprivileged username, though.  Sounds more like a "boot from rescue
> media and do everything in a root shell" sort of job.  

It is, but...

"5. Create a user account:

username=YOUR_USERNAME
zfs create rpool/home/$username
adduser $username
cp -a /etc/skel/. /home/$username
chown -R $username:$username /home/$username
..."

https://openzfs.github.io/openzfs-docs/Getting%20Started/Debian/Debian%20Buster%20Root%20on%20ZFS.html

:)


> So I'm more
> inclined to think the damage was done by some sort of backup/recovery
> gone wrong, as previously speculated.)

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Thread

Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-24 11:00 +0100
  Re: Bullseye - who and users return nothing Greg Wooledge <greg@wooledge.org> - 2022-01-24 13:50 +0100
    Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 02:40 +0100
    Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 02:40 +0100
      Re: Bullseye - who and users return nothing Greg Wooledge <greg@wooledge.org> - 2022-01-25 04:00 +0100
        Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 04:10 +0100
          Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 04:10 +0100
            Re: Bullseye - who and users return nothing Greg Wooledge <greg@wooledge.org> - 2022-01-25 04:30 +0100
              Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 05:10 +0100
                Re: Bullseye - who and users return nothing Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2022-01-25 05:20 +0100
                Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 05:30 +0100
                Re: Bullseye - who and users return nothing David Wright <deblis@lionunicorn.co.uk> - 2022-01-25 06:00 +0100
                Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 06:40 +0100
                Re: Bullseye - who and users return nothing Andrei POPESCU <andreimpopescu@gmail.com> - 2022-01-25 11:50 +0100
                Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 13:20 +0100
      Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 14:10 +0100
        Re: Bullseye - who and users return nothing local10 <local10@tutanota.com> - 2022-01-25 14:20 +0100
        Re: Bullseye - who and users return nothing Greg Wooledge <greg@wooledge.org> - 2022-01-25 14:20 +0100
          Re: Bullseye - who and users return nothing "Gareth Evans" <donotspam@fastmail.fm> - 2022-01-25 16:00 +0100

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