Dist-upgrading Ubuntu Server 18.04 located in remote site?

[Ralf Mardorf]

On Mon, 07 Feb 2022 19:33:20 +0100, Bo Berglund wrote:
>Is there any way to enlarge the boot partition or move /boot to be
>located below / instead (there is pleny of room in the / partition...
>Right now it is on a different disk and mounted into /boot...

Hi,

you can create a /boot directory inside the root directory (on the disk
containing the root directory;) and copy, don't move the content from
the original /boot partition to this new directory. Since you don't have
got physical access to the computer, you can't change the boot device
order, hence you need to add a chainload entry to the original grub.cfg
of the original /boot disk. You need to keep the original /boot disk's
grub2 and in addition install grub2 or any other bootloader to the new
disk. To make the new disk's /boot directory the install's /boot, just
comment out the /boot entry in /etc/fstab. However, if you restart the
computer, it will first boot the old grub2, where you need to
(auto-)select the chainload entry, to boot the new grub2.

No responsibility is taken for the correctness of this information.
Test this first at home e.g. using a virtual environment. If the test
should work, still consider the risk of typos etc. when repeating this
on the real machine without physical access.

Regards,
Ralf