Sure, but as I understood, the question was how to do that “properly” with dpkg and apt-get, i.e. without the ‘new’ apt script.

@fluckx@lemmy.world

dpkg doesn’t resolve dependencies (that’s a feature of apt) which means that if you install a Debian package with dpkg, you’ll have to manually install all dependencies first, and they won’t be marked as automatically installed

Usually installing a manually downloaded package and its dependencies works like this:
# dpkg -i package-file.deb
# apt-get -f install

So apt-get can be used to install missing dependencies afterwards while marking them as automatically installed.

Any idea why flatpack doesn’t remove unused (automatically installed) dependencies automatically or at least give a hint, as e.g. apt does?

It says ‘run as root’, not installed using root privileges. You’d also need root privilege to dd an image onto a drive either.

Thanks.

For some reason it’s not included in Debian Bookworm (currently stable) and Bullseye. It previously was in Buster and will hopefully again be in Trixie (currently testing).

Not every package, but some of them. The remaining are dependencies. Essentially, one can (iteratively) copy paste the output list of apt autoremove into apt install until apt autoremove doesn’t want to uninstall packages one intends to keep.

You can then either ‘install’ them with apt, which does essentially only mark installed packags as manually installed or use e.g. synaptic for that.

It may be that it wants to uninstall some kde-plasma-desktop metapackage, not the whole bunch of all kde apps. If it is uninstalled, nothing crucially important happens. Try to remove it with apt if you’re running some Debian or Ubuntu flavour.

You can install an and uninstall Flatpak applications in Linux as normal user.