noauto option ignored in /etc/fstab?

[Xen]

Josef Wolf schreef op 04-12-2017 17:13:
> On Fri, Dec 01, 2017 at 10:14:18AM -0500, Tom H wrote:
>> On Fri, Dec 1, 2017 at 5:36 AM, Josef Wolf <jw at raven.inka.de> wrote:
>> > On Fri, Dec 01, 2017 at 05:12:58AM -0500, Tom H wrote:
>> >> On Fri, Dec 1, 2017 at 2:50 AM, Josef Wolf <jw at raven.inka.de> wrote:
>> >>>
>> >>> I have the following line in /etc/fstab:
>> >>>
>> >>> UUID=XXXX-XXXX-XXXX-XXXX /boot ext4 noauto,relatime 0 2
>> >>>
>> >>> The noauto option should prevent the fs to be mounted during boot.
>> >>>
>> >>> That worked great in every distro I have touched in the last 20 years.
>> >>>
>> >>> But since I reinstalled this box with 16.04 LTS, this FS is mounted
>> >>> during boot.
>> >>>
>> >>> Any ideas what causes this FS to be mounted during boot?
>> >>
>> >> Is this an EFI system?
>> >>
>> >> If it is, you'll have to set "/boot/efi" as "noauto" too.
>> >
>> > Before the reinstall, I had 14.04 with EFI and everything worked fine.
>> >
>> > The the disk failed. I reinstalled 16.04 WITHOUT EFI.
>> >
>> > Thus, no. There's no /boot/efi anymore on this system.
>> 
>> Here's the output from my laptop before and after adding "noauto" to
>> the "/boot" line in "/etc/fstab" ("/boot" is my EFI partition). It
>> works. You must have misconfigured something or hit a bug.
> 
> Well, it might work for you, but it doesn't work for me...
> 
> So, how do I find out what's the cause?

Have you tried disabling automatic updates already?

sudo vi /etc/apt/apt.conf.d/10periodic

and

sudo vi /etc/apt/apt.conf.d/20auto-upgrades

and/or

systemctl stop unattended-upgrades.service

and/or

systemctl disable unattended-upgrades.service

I don't know exactly how it works.

You can also remove /boot from /etc/fstab and create your own mount 
command.

Systemd will not touch what it does not know about.

But I would try the former first.













Also if your system if different:

systemd-analyze dot | grep boot.mount