how to catalog my files

[Doug Stewart]

I want to make a data base or file that has a list of all files ( or a 
subsection of all files) and their location. This info should be 
sortable by filename or date or size etc.

What I want to know  is how many duplicates I have across 3 computers.
2 windows XP and this Ubuntu one.

I am new to Linux and Ubuntu but back in CPM days ( 1982) I had such a 
system and now would like it in Ubuntu.

Does this exist?
Doug