apt update fails NO_PUBKEY 93D6889F9F0E78D5

[binkerd]

When I run apt update on my Armbian machine (station-p2) I have started getting the following error message:

 

mark@station-m2:~$ sudo apt update
Hit:2 http://deb.debian.org/debian bullseye InRelease
Hit:3 http://deb.debian.org/debian bullseye-updates InRelease
Hit:4 http://deb.debian.org/debian bullseye-backports InRelease
Hit:5 http://security.debian.org bullseye-security InRelease
Hit:1 http://armbian.chi.auroradev.org/apt bullseye InRelease
Hit:7 http://giteduberger.fr rpimonitor/ InRelease
Get:6 https://github.armbian.com/configng stable InRelease [3,264 B]
Err:6 https://github.armbian.com/configng stable InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 93D6889F9F0E78D5
Reading package lists... Done
W: GPG error: https://github.armbian.com/configng stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 93D6889F9F0E78D5
E: The repository 'https://armbian.github.io/configng stable InRelease' is not signed.
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.
mark@station-m2:~$

 

This has been happening for the past few days, and I don't know how to resolve the issue.  I can get to the https://github.armbian.com/configng webpage from my network but I keep getting errors when trying to update.  Any ideas on how to resolve this?

[Werner]

Try this:

 

https://forum.armbian.com/topic/23465-apt-get-update-fails-with-public-key-errors/?do=findComment&comment=172106

and below

[binkerd]

That worked!  Thank you for the quick response and the simple fix to this issue.

 

Mark Binkerd

[binkerd]

I think I spoke too soon.  The sudo apt update process is working but when I try to do sudo apt upgrade I get an error:

 

mark@station-m2:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  armbian-config
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/114 kB of archives.
After this operation, 611 kB disk space will be freed.
Do you want to continue? [Y/n] y
dpkg-deb: error: archive '/var/cache/apt/archives/armbian-config_25.2.0-trunk.25.1114.223708_all.deb' uses unknown compression for member 'control.tar.zst', giving up
dpkg: error processing archive /var/cache/apt/archives/armbian-config_25.2.0-trunk.25.1114.223708_all.deb (--unpack):
 dpkg-deb --control subprocess returned error exit status 2
Errors were encountered while processing:
 /var/cache/apt/archives/armbian-config_25.2.0-trunk.25.1114.223708_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

 

Seems that whatever update this is it is compressed with the zst format.  I don't know if this is a repository error or something that needs fixing on my system.  

 

Any help would be appreciated.