It is easy to overlook orphaned files without an assigned existing owner or group after moving large amounts of data. Fortunately, it is easy to spot these files using the find utility.

Use the following command to find orphaned files inside /path.

$ find /path -nouser -or -nogroup

You can quickly verify the obtained results in the following way.

$ find /path -nouser -or -nogroup -exec ls -l {} \;
-rwxrwxrwx 1 1008 users 92061 cze 17  2009 /path/media/journal.log
-rwxrwxrwx 1 1044 1044  54667 sie 27  2009 /path/media/scripts_backup.tgz