I've installed some things manually in the past and would like to weed out all related files. So, I need a way to automatically find all the files (in /usr, for example) that are not included in any of the packages currently installed on the Debian system. However, I would also need to filter out the files that are created during package installation (by dpkg post-install scripts and similar things).
cruft is a program to look over the system for anything that shouldn't be there, but is; or for anything that should be there, but isn't.
You could try something like this:
dpkg -L --list-all-package-files | grep "^/usr" > dpkg-files.dat **(don't know the dpkg option "--list-all-package-files", read mand dpkg)** find /usr -type f -o -type l > all-usr-files.dat sort dpkg-files.dat all-usr-files.dat | uniq -c | grep " 1 "
This way you will get all files that are in /usr but not any package file. As a first shot this could help you.