Ruby on Rails: Hello World

Long-time Java dev, first-time Ruby dev. Trying to reach the "hello world" step with a Rails app, and having difficulty.

I'm positive that I'm missing something basic here. That being said, none of StackOverflow's "Questions with similar titles" nor Google's "ruby rails hello world" hits (or variants thereof) have clarified what I'm missing.

I've got ruby (v1.9.3p194), gem (1.8.23) and rails (3.2.3) installed via RVM. I generated a controller using:

rails generate controller common

In the default "config/routes.rb", I have the following two routing attempts:

Web::Application.routes.draw do
  root :to => "common#index"
  match ':controller(/:action(/:id))(.:format)'
end

When I initially ran "rails server" and loaded "http://localhost:3000/common" in my browser, I saw the following:

Unknown action
The action 'index' could not be found for CommonController

I learned this is because "index" was not defined for my common controller, so I've edited "app/controllers/common_controller.rb" to contain the following:

class CommonController < ApplicationController

  def index
  end

end

I now see the following at "http://localhost:3000/common" in my browser:

Template is missing
Missing template common/index, application/index with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :coffee]}. Searched in: * "/coding/workspace/[My] Toolbag/web/app/views"

I see the same thing at root, which makes sense.

From what I've found, this is clearly due to not having anything rendering in my controller, so I believe it should instead be checking for something at "app/views/common/index.html.erb" -- however, I do have a file there, containing the following:

<h1>Hello World</h1>

I've also tried renaming "index.html.erb" to "