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I have just set up a new, stripped down Ubuntu 16.04 LTS server, with automatic updates turned off. Over the weekend it mysteriously updated /boot/grub/grub.cfg, which started a whole bunch of kernel threads and a few daemons that I don't want/need running (like metad etc - disabled in systemd).

Looking at the system logs and journalctl shows when this happened but not what actually caused update-grub or equivalent to run. I've looked through systemctl and the cron job directories looking for possible job files but nothing stands out.

  1. What job does this unattended update-grub?
  2. Are there better logs or tools for finding out what is running this job?

Many thanks in advance,

John.

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It sounds like the unattended-upgrades may be running. See related post.

Also check /var/log/unattended-upgrades for activity from that tool.

See /var/log/apt/history.log for a history of package upgrades your system.

  • Many thanks for that. It was that. Despite turning off unattended updates in the installer it still did it which is a change form 14.04. Grrr. I have commented out the repo sections in 50unattended-upgrades as I do want to be reminded of updates when I log in. Then I can schedule and outage when it's convenient. Many thanks :-). – John Hobbins Feb 28 '17 at 17:45

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