Hello and thank you for reporting this bug. Do you still get any errors if you run:
sudo apt update sudo apt -f install sudo apt full-upgrade If you do, can you attach the output to this bug? 'atd' claims: Setting up at (3.1.18-2ubuntu1) ... Failed to connect to bus: Connection refused Failed to connect to bus: Connection refused Failed to connect to bus: Connection refused Failed to connect to bus: Connection refused Failed to connect to bus: Connection refused invoke-rc.d: initscript atd, action "start" failed. dpkg: error processing package at (--configure): subprocess installed post-installation script returned error exit status 1 but it's unclear which bus it's failing to connect to and why exactly. Please mark the bug as New once you provide the requested information. ** Changed in: at (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to at in Ubuntu. https://bugs.launchpad.net/bugs/1693054 Title: package at 3.1.18-2ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/at/+bug/1693054/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs