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Apt, packages kept back: why and how to resolve it?
(lemmy.g97.top)
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The Ubuntu based distros may have this phased update thing. That AskUbuntu link has a command to override APT package manager to install the held-back packages.
Ubuntu tends to hold back system critical packages in case there are issues. Systems with certain install UUIDs will be 'guinea pigs' and install these packages before everyone else. You can override this behavior and disable phased updates on that particular computer.