FSlint - A utility to find File System lint.
This includes duplicate files, empty directories,
problematic filenames, etc.
This snap is just try to resurrect something, that disappeared with Ubuntu 18.04. There a better, more up to date tool now: https://github.com/qarmin/czkawka
Enable snaps on Kubuntu and install fslint-unofficial
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.