Hi Ingo,
> There is also an updated version by Gunnar Ritter, 15 years younger,
> i.e. from 2007: http://heirloom.sourceforge.net/doctools/troff.pdf
Interesting.
> The Plan 9 troff(1) manual cites:
>
> B. W. Kernighan, ``A TROFF Tutorial'', Unix Research System
> Programmer's Manual, Tenth Edition, Volume 2.
>
> That should be available from:
>
> www.cs.bell-labs.com/10thEdMan/
>
> Unfortunately, that site is offline again, so i cannot check right
> now, but last time i was there, i think all the chapters were
> available.
That URL worked for me, yesterday and today. I've been having trouble
with {cm,plan9}.bell-labs.com recently and then found that 46.0.0.0/8
was being discarded due to recent DoS attacks from Russia. That's been
reverted recently after I pointed out it's not all RU but some GB and
others too. So you may want to try accessing it from other IP addresses
in case yours is in another set being discarded. Or just trust
http://isup.me/http://www.cs.bell-labs.com/10thEdMan/
Cheers, Ralph.
