find duplicate, not hardlinked, files (BSD and GNU userland)
-rw-r--r-- 243 0-README
drwxr-xr-x - LICENCES
drwxr-xr-x - bash-ksh
drwxr-xr-x - bash
drwxr-xr-x - ksh
drwxr-xr-x - ksh93
drwxr-xr-x - mksh
drwxr-xr-x - posix
drwxr-xr-x - zsh