Nextcloudpi running on Armbian running on Debian Buster 19.11.7 - upgrade not possible - now no access anymore

My Nextcloudpi was running like a charm for years on an Odroid HC1 (no possibility to attache a monitor). It was still running Debian Buster 19.11.7. It was running so well that I neglected it a little too much. And then, when I attempted to upgrade the distro, it went bad.

During the upgrade the following error occured:

Err:5 http://httpredir.debian.org/debian buster-backports Release              
  404  Not Found [IP: 2a04:4e42:6f::644 80]
Ign:6 http://mirrors.dotsrc.org/armbian-apt buster InRelease
Err:7 http://mirrors.dotsrc.org/armbian-apt buster Release
  404  Not Found [IP: 2001:878:346::116 80]
Reading package lists... Done
E: The repository 'http://httpredir.debian.org/debian buster-backports Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://apt.armbian.com buster Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Something went wrong. Fix it and try again

Then I followed this guidance
In /etc/apt/sources.list.d/armbian.list I commented out the armbian repo and in /etc/apt/sources.list I changed from buster to bullseye. The I ran apt update, then
apt upgrade --without-new-pkgs, then apt full-upgradeand then I rebooted the system. The Ordoid HC1 seemed to have started up again, I also see it my router, but it cannot be accessed via SSH, via the webbrowser nor the web-domain.

  1. Is there a way to fix the install?
  2. If not, is there a way to retreive the data and configs? (Not sure if the drive was encrypted. What is the default of Nextcloudpi?)

Would really appreciate help.

But you should have the ability to connect a TTY via an RS-232 or TTL-USB cable.

Then you could take a “look inside” and maybe fix it


Much and good luck,
ernolf