I am newer to Ruby and learning it more and more each day. One thing I have noticed is, some of the applications, such as Tracks, that use Ruby need to know where the path to Ruby is.
I had this dedicated server setup for me to play around with. I had them install things like ColdFusion and Ruby with the Rails packages.
I know in php you have the phpinfo.php that you can use to find anything about your php install out. Does Ruby have something like that?