From: Brian Candler <b.candler@...>
Date: 2011-02-14T06:22:15+09:00
Subject: Re: Ruby is not accessible from the my terminal

You have the ruby18 and irb18 packages installed, but not ruby and irb 
(which install links to these names)

Try:
sudo apt-get install ruby irb

- which is of course exactly what Ubuntu was telling you to do.

(I am assuming this is ubuntu 10.04; it's changed for 10.10, there is 
thankfully less fragmentation of the ruby packages)

-- 
Posted via http://www.ruby-forum.com/.