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I tried to upgrade from fedora 25 to fedora 26. I followed the following commands, as explained in the journal

  1. sudo dnf upgrade --refresh
  2. sudo dnf install dnf-plugin-system-upgrade
  3. sudo dnf system-upgrade download --releasever=26 --allowerasing
  4. sudo dnf system-upgrade reboot

When running the last command, the system reboots and then grub pops-up. I boot the last kernel and then the Upgrade screen shows off.

That is the point when it stays there for a few seconds and then the system is rebooted in fedora 25.

Any idea on how to find out what is the issue? I am not aware whether there are any log files.

The only thing I could do, was to take a video of the procedure!

Any help will be appreciated!

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  • What do you get from journalctl -b -1 (for logs from the previous boot) when the system comes back up? (Or journalctl --since yesterday)
    – mattdm
    Jan 5, 2018 at 19:26
  • Thanks for your comment! The first 54 lines can be found here pastebin.com/Gkdnj9QV Do you think more lines could be useful?
    – Thanos
    Jan 5, 2018 at 19:33
  • Maybe? There's definitely nothing useful there. :) Try journalctl -p err to just see errors...
    – mattdm
    Jan 5, 2018 at 19:34
  • In reverse order. You can see here pastebin.com/YJCpqGtv
    – Thanos
    Jan 5, 2018 at 19:38
  • I also tried journalctl -r -p err | grep upgrade and I get this pastebin.com/dfX5kEyE
    – Thanos
    Jan 5, 2018 at 19:46

1 Answer 1

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From your DNF log, the initial problem is disk space:

Error Summary
-------------
Disk Requirements:
   At least 2459MB more space needed on the / filesystem.

and then from today:

Error Summary
-------------
Disk Requirements:
   At least 359MB more space needed on the / filesystem.

which is closer. :) Then I think possibly there was a partial upgrade to 25 to 26 somewhere in there which blew up for reasons unknown, and now the issues remaining are dealing with duplicates from that.

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