On Mon, May 17, 2010 at 09:21:18AM +0200, Marc Balmer wrote: > Is the SEE ALSO section meant to refer to external sources? I always > thought it was only to reference other manpages.
I don't know if there has ever been a strict rule about this; even some of the really old manual pages refer to external sources. As manual pages are kind of bulletins or snapshots, I believe references to good books or other useful material may be useful to someone. These also signal a message that we don't try to document it all here; "if you are interested, there is better and more detailed documentation elsewhere". - Jukka.