Hi folks,
some days ago I did an upgrade of Fedora Xfce from verion 40 to version
41. I used the method described in "Upgrading Fedora Linux Using DNF
System Plugin"
(https://docs.fedoraproject.org/en-US/quick-docs/upgrading-fedora-offline/).
To me the last step "sudo dnf system-upgrade reboot" did work correctly
and then reboot the now updated system. At least I see the start screen
of version 41. But now I'm no longer able to log into the computer,
neither via GUI/Xfce nor via console/tty.
In the local user database /etc/passwd there are 3 users (meikel,
sysadmin, backup) and I tried to login with each of them, but with none
of them I succeeded to log in.
Then I restarted the system from a live USB. From live I was able to
mount root (/) and home (/home). At a first glance I did not remark
something special under /home. I just copied all files under /var/log to
an USB stick for further analysis. I quickly checked in /var/log the
following files: messages, Xorg.0.log, secure and audit/audit.log but
it's hard for me to interpret all the messages. In secure I found
something about unix_chkpwd which might be related to the problem,
because it concerns all the 3 users (meikel, sysadmin, backup) which I
tried to log in. I ran
grep "unix_chkpwd" secure
with the following result:
Nov 14 01:30:09 meikel-pc unix_chkpwd[1505]: check pass; user unknown
Nov 14 01:34:49 meikel-pc unix_chkpwd[1522]: check pass; user unknown
Nov 14 01:34:49 meikel-pc unix_chkpwd[1522]: password check failed for
user (meikel)
Nov 14 01:34:51 meikel-pc unix_chkpwd[1530]: check pass; user unknown
Nov 14 01:34:55 meikel-pc unix_chkpwd[1531]: check pass; user unknown
Nov 14 01:34:55 meikel-pc unix_chkpwd[1531]: password check failed for
user (meikel)
Nov 14 01:34:56 meikel-pc unix_chkpwd[1533]: check pass; user unknown
Nov 14 01:35:09 meikel-pc unix_chkpwd[1575]: check pass; user unknown
Nov 14 01:35:09 meikel-pc unix_chkpwd[1575]: password check failed for
user (meikel)
Nov 14 01:35:10 meikel-pc unix_chkpwd[1579]: check pass; user unknown
Nov 14 01:37:13 meikel-pc unix_chkpwd[1487]: check pass; user unknown
Nov 14 01:37:17 meikel-pc unix_chkpwd[1488]: check pass; user unknown
Nov 14 01:37:17 meikel-pc unix_chkpwd[1488]: password check failed for
user (meikel)
Nov 14 01:37:18 meikel-pc unix_chkpwd[1490]: check pass; user unknown
Nov 14 01:38:28 meikel-pc unix_chkpwd[1482]: check pass; user unknown
Nov 14 01:38:33 meikel-pc unix_chkpwd[1483]: check pass; user unknown
Nov 14 01:38:33 meikel-pc unix_chkpwd[1483]: password check failed for
user (meikel)
Nov 14 01:38:35 meikel-pc unix_chkpwd[1486]: check pass; user unknown
Nov 14 01:38:48 meikel-pc unix_chkpwd[1490]: check pass; user unknown
Nov 14 01:38:48 meikel-pc unix_chkpwd[1490]: password check failed for
user (meikel)
Nov 14 01:38:50 meikel-pc unix_chkpwd[1495]: check pass; user unknown
Nov 14 01:40:17 meikel-pc unix_chkpwd[1475]: check pass; user unknown
Nov 14 01:40:25 meikel-pc unix_chkpwd[1478]: check pass; user unknown
Nov 14 01:40:38 meikel-pc unix_chkpwd[1482]: check pass; user unknown
Nov 14 01:40:38 meikel-pc unix_chkpwd[1482]: password check failed for
user (sysadmin)
Nov 14 01:40:40 meikel-pc unix_chkpwd[1487]: check pass; user unknown
Nov 14 01:40:46 meikel-pc unix_chkpwd[1489]: check pass; user unknown
Nov 14 01:40:54 meikel-pc unix_chkpwd[1493]: check pass; user unknown
Nov 14 01:40:54 meikel-pc unix_chkpwd[1493]: password check failed for
user (backup)
Nov 14 01:40:56 meikel-pc unix_chkpwd[1501]: check pass; user unknown
I think the time 01:30:09 until 01:40:56 on 11th november corresponds
exactly to when i treid to log into the system.
What does "unix_chkpwd[....]: check pass; user unknown" mean? Could it
be a result of the upgrade from 40 to 41? What can I do to be able to
log into the machine again?
Regards,
Meikel
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