[ Thanks to Jeremy C.
Reed for this link. ]
“Some more explanations and information about some uncommon
or rarely-used utilities often installed on BSD systems.“
“In the last “esoteric commands” article, I briefly described
several uncommon or rarely-used commands commonly installed on
BSD-type systems, such as XNSrouted, clri, addftinfo, slattach,
bad144 and others. This article continues with more explanations of
some esoteric commands that are often installed by default (in the
base install) by different BSD flavours.”