NAME

rmdir  −  remove directory

SYNOPSIS

rmdir dir ... 

DESCRIPTION

Rmdir removes (deletes) directories.  The directory must be empty (except for the standard entries ‘.’ and ‘..’, which rmdir itself removes).  Write permission is required in the directory in which the directory to be removed appears. 

BUGS

Needs a −r flag. 
Actually, write permission in the directory’s parent is not required. 
Mildly unpleasant consequences can follow removal of your own or someone else’s current directory.