CLEAR DIRECTORY [DirName] Empties the named directory (or by default the current directory), i.e. remove the segments and subdirectories it contains. As a consequence, under X, the windows attached to input directory are also cleared. If the subdirectories had windows attached, they are destroyed in con- junction to them. If the current working directory has to be destroyed, i.e. it is a subdirectory of the directory to be cleaned, it is im- plicitely moved to the latter.