From: utzoo!henry
Newsgroups: net.bugs.v7
Title: ln -f 
Article-I.D.: utzoo.2859
Posted: Tue Mar  8 21:49:37 1983
Received: Tue Mar  8 21:49:37 1983

The ln(1) command has an undocumented -f option, which makes it possible
to link to directories, the kernel permitting (which it doesn't unless
you are superuser).  The ln(1) manual page should show this.