For each group, you can specify what actions they can take regarding a particular file, these are Read, Write, Execute, and Delete. This is a common way to set protectins. More info on protections. This method of protection is generally configured by the system manager rather than by a user. Create a subdirectory named subdir1.dir in the current directory.
Directories can only go eight levels deep.
You must have appropriate Write access to the point where the directory is going in. Change protections so that you can delete it. First delete everything that is in it. Then delete it. You can use either an absolute directory path, a relative directory path, or a logical name defined to be one of these.