Chmod-r O+rx/data

When using a chmod-r o+rx/data, you set the Execute permission on all directories as well as files in The/data Director Y.

To set the Execute permission to directories only, and not to files, with the use Chmod-r o+rx/data. The uppercase X ensures that files would not get the Execute permission unless the file have already set the Execute Permiss Ion for some of the entities. That makes X the more intelligent a-dealing with execute permissions; It'll avoid setting that permission on files where it's not needed.

Chmod-r O+rx/data