From what I’m reading, autoclean would remove any local packages which couldn’t be download (i.e. they are out of date). This would indeed fix the issue, but your packages could still be missing critical udpates.

When possible you should definitely run ‘sudo apt update && sudo apt dist-upgrade’ to get the latest stuff installed. If it says you’re up to date then that’s awesome and no further action is needed.

This is almost always the issue. Apt is not like yum and pacman, you must first run apt update or it will inevitably fall out of sync with the current packages when you try to run install or upgrade, etc.

I have indeed seen that XO-CE script. But is it true that you have to delete and recreate the container, rather than just doing apt update? AFAIK XO_CE is just a debian VM.

Put single quotes around the URL.

? and & are special characters, and the shell will think you meant something unintended if you dont protect them.