Daniel Carrera wrote:

>> hello.rb:3:in `require': No such file to load -- fox (LoadError)
>>         from hello.rb:3
> 
> This is the message I get.
> 
>>
>> it means that FXRuby either is installed in the wrong directory or isn't
>> installed at all (which are the same thing as far as Ruby is concerned).
> 
> This is odd, all the files are installed in
> /usr/lib/ruby/site_ruby/1.6/fox/ except for fox.rb which is missing.  Even
> the source distribution doesn't seem to have "fox.rb".

There is no "fox.rb" file since it's a compiled extension module and not 
a pure Ruby library. The file name you're looking for is "fox.so" and 
should be in (I guess):

     /usr/lib/ruby/site_ruby/1.6/i686-linux