Hello, I am using Linux Mint 20.2 Uma 64-bit with Mate desktop on my computer. Today I updated the machine in terminal as superuser by passing the following command *apt-get update && apt-get upgrade *.
1. I received the following invalid signature key message output as follows: Ign:1 http://packages.linuxmint.com uma InRelease Hit:2 http://packages.linuxmint.com uma Release Hit:3 http://security.ubuntu.com/ubuntu focal-security InRelease Hit:4 http://archive.ubuntu.com/ubuntu focal InRelease Hit:5 http://archive.canonical.com/ubuntu focal InRelease Hit:6 http://ppa.launchpad.net/sane-project/sane-release/ubuntu focal InRelease Hit:7 https://repo.skype.com/deb stable InRelease Hit:8 http://archive.ubuntu.com/ubuntu focal-updates InRelease Hit:10 http://archive.ubuntu.com/ubuntu focal-backports InRelease Get:11 http://download.opensuse.org/repositories/home:/pzz/xUbuntu_20.04 InRelease [1,509 B] Err:11 http://download.opensuse.org/repositories/home:/pzz/xUbuntu_20.04 InRelease The following signatures were invalid: EXPKEYSIG 23E07629B9E3C9E4 home:pzz OBS Project <home:[email protected]> Reading package lists... Done W: GPG error: http://download.opensuse.org/repositories/home:/pzz/xUbuntu_20.04 InRelease: The following signatures were invalid: EXPKEYSIG 23E07629B9E3C9E4 home:pzz OBS Project <home:[email protected]> E: The repository 'http://download.opensuse.org/repositories/home:/pzz/xUbuntu_20.04 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. 2. I am using the openSUSE build service to aquire a prebuilt binary package of sane-airscan and have the following sources entry added in Update Manager -> Software Sources -> deb http://download.opensuse.org/repositories/home:/pzz/xUbuntu_20.04/ / 3. I typically update the desktop here every few days and have had no signature issues for quite some time. 4. I did attempt the following by using GUI: Update Manager -> Software Sources -> Maintenance -> Add missing keys 5. I then attempted to once again update APT cache within update manager (not bash terminal this time) with the following error output: *Failed to download repository information *the following dialog is shown below this message -> W:GPG error: http://download.opensuse.org/repositories/home:/pzz/xUbuntu_20.04 InRelease: The following signatures were invalid: EXPKEYSIG 23E07629B9E3C9E4 home:pzz OBS Project <home:[email protected]>, E:The repository 'http://download.opensuse.org/repositories/home:/pzz/xUbuntu_20.04 InRelease' is not signed. I am wondering of what is the best step to proceed with this matter? I understand that I could possibly disable the repository quite easily in update manager. Then I would no longer receive updates for sane-airscan though. I thank you for help with this if able. -Best Wishes
