Something got really messed up during the upgrade. There are broken dependencies and some packages (like some vim addon) don't work at all. Vim, for instance is unusable.
I have tried all the dpkg/apt/apt-get commands to fix broken dependencies, broken packages, etc, and they all return without error now [1], but aptitude starts "resolving dependencies" and it soon uses up all the available RAM, then all the available swap and the system slows down (thrashing) and then freezes. Earlier on, I fixed /etc/apt/sources.list and the apt/apt-get/dpkg commands installed and removed some packages, but now it's at a steady state where there are no errors according to these commands. I've tried this operation (the same HD) on a system with 8 GB RAM (the original system), one with 16 GB and one with 32 GB. Same result. I've even tried: debsums -cs Find which packages contain the corrupt files. Returns a list of packages. debsums -c | xargs -rd '\n' -- dpkg -S | cut -d : -f 1 | sort -u Reinstall the damaged packages: xargs -rd '\n' -a <(sudo debsums -c | xargs -rd '\n' -- dpkg -S | cut -d : -f 1 | sort -u) -- sudo apt-get install -f --reinstall -- Check if no corrupt files remain. Should return no output if everything ok. debsums -c If config files have changed, this will show them. debsums -as But debsums -cs didn't return anything, so apparently nothing is corrupt, at least as far as apt/dpkg/apt-get are concerned. Apparently, the apt/dpkg/apt-get sub-systems don't find the problems. Aptitude knows there's something wrong but can't fix it. What can I do to make aptitude finish resolving dependencies and fix the broken packages? Where can I look for hints? Help please! Augustine [1] I've tried all the steps specified here: https://www.makeuseof.com/how-to-find-and-fix-broken-packages-on-linux/ https://linuxhint.com/apt_get_fix_missing_broken_packages/ and more. After so many tries, the same set of dpkg/apt/apt-get commands are repeated on multiple web sites.
