To start interactive Ruby Shell, type at the command prompt:
irb
At the irb prompt, type the following commands. Replace gem_name with the name of the gem that you want to test:
require 'rubygems' require 'gem_name'
If result comes true then environment is set up correctly.
If result comes LoadError: no such file to load -- gem_name then environment is not set up correctly. Ruby cannot load the specified gem. Type the following command:
p $LOAD_PATH
The $LOAD_PATH global variable stores an array that contains all of the directories Ruby searches when the load methods are called.
