Upgrade all your systemd containers at once with this small script

If you are operating a server, chances are that you use containers to provide an additional layer of isolation for the services running on this server. One method for setting up and running containers is using the systemd built-in tools, namely systemd-nspawn (click here for my previous guide on how to set up containers).

Keeping your system up to date is always crucial when operating a server. When using containers, you need to make sure that every container is kept up to date, since each of them occupies their own portion of the filesystem.

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