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Cron <root@server> test -f /var/lib/rear/layout/disklayout.conf && /usr/sbin/rear checklayout || /usr/sbin/rear mkrescue

kgs

Howdy,

My VPS has been sending me nightly notifications with the above subject line. The body of the email is as follows:

ERROR: Cannot autodetect what to use as KERNEL_FILE, you have to manually specify it in /etc/rear/local.conf
Some latest log messages since the last called script 400_guess_kernel.sh:
2026-06-26 01:30:05.055786631 Including prep/GNU/Linux/400_guess_kernel.sh
2026-06-26 01:30:05.065762218 No kernel file '/boot/vmlinux-4.18.0' found
/usr/share/rear/lib/_input-output-functions.sh: line 476: type: get_kernel_version: not found
2026-06-26 01:30:05.068554781 No get_kernel_version binary, skipping searching for kernel file in /boot
2026-06-26 01:30:05.071498571 No Red Hat kernel file '/boot/efi/efi/redhat/vmlinuz-4.18.0' found
Aborting due to an error, check /var/log/rear/rear-server.log for details

Here is the log

[root@server ~]# tail -30 /var/log/rear/rear-server.log
2026-06-26 01:30:04.912103492 Using '/usr/bin/xorrisofs' to create ISO images
2026-06-26 01:30:04.920135402 Including prep/default/321_EFISTUB_check_uefi_env.sh
2026-06-26 01:30:04.962635165 Including prep/ISO/Linux-i386/330_find_isolinux.sh
2026-06-26 01:30:04.988725649 Including prep/default/330_include_uefi_tools.sh
2026-06-26 01:30:05.009763289 Including prep/ISO/GNU/Linux/340_add_isofs_module.sh
2026-06-26 01:30:05.026759956 Including prep/ISO/GNU/Linux/360_EFISTUB_prechecks.sh
2026-06-26 01:30:05.041286517 Including prep/default/380_include_opal_tools.sh
/usr/share/rear/lib/_input-output-functions.sh: line 476: type: sedutil-cli: not found
2026-06-26 01:30:05.055786631 Including prep/GNU/Linux/400_guess_kernel.sh
2026-06-26 01:30:05.065762218 No kernel file '/boot/vmlinux-4.18.0' found
/usr/share/rear/lib/_input-output-functions.sh: line 476: type: get_kernel_version: not found
2026-06-26 01:30:05.068554781 No get_kernel_version binary, skipping searching for kernel file in /boot
2026-06-26 01:30:05.071498571 No Red Hat kernel file '/boot/efi/efi/redhat/vmlinuz-4.18.0' found
2026-06-26 01:30:05.091797715 ERROR: Cannot autodetect what to use as KERNEL_FILE, you have to manually specify it in /etc/rear/local.conf
===== Stack trace =====
Trace 0: /usr/sbin/rear:541 main
Trace 1: /usr/share/rear/lib/mkrescue-workflow.sh:12 WORKFLOW_mkrescue
Trace 2: /usr/share/rear/lib/framework-functions.sh:116 SourceStage
Trace 3: /usr/share/rear/lib/framework-functions.sh:56 Source
Trace 4: /usr/share/rear/prep/GNU/Linux/400_guess_kernel.sh:118 source
=== End stack trace ===
2026-06-26 01:30:05.105161393 Exiting rear mkrescue (PID 271647) and its descendant processes ...
2026-06-26 01:30:08.135865895 rear,271647 /usr/sbin/rear mkrescue
  `-rear,272095 /usr/sbin/rear mkrescue
      `-pstree,272096 -Aplau 271647
/usr/share/rear/lib/_input-output-functions.sh: line 151: kill: (272099) - No such process
2026-06-26 01:30:08.171595973 Running exit tasks
2026-06-26 01:30:08.174062769 Finished in 7 seconds
2026-06-26 01:30:08.176128114 Removing build area /tmp/rear.ALbJhHlNneAXwTx
2026-06-26 01:30:08.185200685 End of program reached

I don't think this is a significant problem, right?

But I would still love to get this fixed (and stop the emails). Any assistance would be appreciated. Thanks!

Comments

3 comments

Date Votes
  • cPRex Jurassic Moderator

    Hey there!  I've had a few customers reach out about this recently but it seems there's an issue with the ReaR software:

    https://relax-and-recover.org/

    This isn't something that is created or distributed by cPanel, but if you have other backup solutions on the machine that may explain where it is coming from.

    0
  • kgs

    Thanks. Any idea how to fix the error, or, at least, stop this particular email from sending?

    0
  • cPRex Jurassic Moderator

    Unfortunately I don't have any ideas on this one since it's a third-party tool.

    0

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