rmdir dir ...
If a file has no write permission and the standard input is a terminal, its permissions are printed and a line is read from the standard input. If that line begins with `y' the file is deleted, otherwise the file remains. No questions are asked and no errors are reported when the -f (force) option is given.
If a designated file is a directory, an error comment is printed unless the optional argument -r has been used. In that case, rm recursively deletes the entire contents of the specified directory, and the directory itself.
If the -i (interactive) option is in effect, rm asks whether to delete each file, and, under -r, whether to examine each directory.
The null option - indicates that all the arguments following it are to be treated as file names. This allows the specification of file names starting with a minus.
Rmdir removes entries for the named directories, which must be empty.