Is there any fast method to delete duplicates of files based on any hash sum (i.e. SHA1 to be fast). Because I've got some mess in my music files.
There is package fdupes in linux (for example, it is present in debian repository). It uses md5sums and then a byte by byte comparison to find duplicate files within a set of directories. It also can delete dups with -d option, but I've never used that option. Also you can grep or sed from output files to delete and remove them from disk.
liten2 http://code.google.com/p/liten2/ works also on mac osx!
Is a python script with quite a few very useful features, like dry runs, interactive delete and more...
And is very fast.