Googling for "ri 1.8" eventually yields the link:
http://prdownloads.sourceforge.net/rdoc/ri-1.8b.tgz?download

Enjoy,
Gennady.

P.S.
  Thanks to Dave Thomas for his efforts

----- Original Message ----- 
From: "Rene van Bevern" <rvb / rvb.dyndns.org>
Newsgroups: comp.lang.ruby
To: "ruby-talk ML" <ruby-talk / ruby-lang.org>
Sent: Wednesday, August 27, 2003 7:31 AM
Subject: Re: ri


> On Wed, 27 Aug 2003 08:57:26 +0900, maillist / bestworldweb.homelinux.com
<maillist / bestworldweb.homelinux.com> wrote:
>
> hi
>
> > Where do I find the ri program, I looked on raa but I couldn't find it.
>
> if you are using debian there is a package called "ri". but since it
> depends on ruby 1.6 i don't think it includes 1.8 specific things :(
>
> Rene van Bevern
>
>