One last try (sometimes an issue nags): $ find A -exec md5sum '{}' + > a-md5 $ find B -exec md5sum '{}' + > b-md5 $ cat a-md5 b-md5 > All $ sort -u -k 1,1 All > dupes Now, (I hopefully got my head around it this time...), the dupes file should contain a list of files that exist in _both_ A and B; but every two files that have the same md5sum will have _only one_ of them listed (either in A OR B). So if you delete that list of files you should end up with only unique files in both locations. -- Ahmad Samir _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx