Ruby and ri(1) ruby information

[Colin Law]

On 17 December 2013 05:49, Kevin O'Gorman <kogorman at gmail.com> wrote:
> I recently would up with a book on Ruby and got curious about it.
> I discovered I have Ruby installed.  This was a fresh install of
> xubuntu 13.04, so I assume it came with the distro.
>
> Following the book (The Ruby Programming Language, O'Reilly) in the
> first few pages it talks about things that come with.  Including the
> ri command, and it gives examples.  None of them work -- they all say
> "Nothing known about x"
>
> Is there something I have done wrong?  Is there something I can do to
> put it right?  Or is this time to file a bug?

What do you get for
apt-cache policy ruby

and
ruby -v

and
which ruby

Colin