Ruby on Rails

running virtual rails on linux mint with rails 2.3.4

im having trouble redirecting routes so here is what ive done by
following tutorials:

i opened rails directory and created rails_test
then i ran script/server to boot mongrel
i opened another terminal and changed directory to rails_test
i then ran script/generate controller site index about help
then i went back to terminal and typed rm public/index.html to remove
index page
after this i went to rails_test folder then navigated and opened
config routes.rb
once in routes.rb i changed the following line:

map.root :controller => "welcome" to...
map.root :controller => "site"

i then got an error message stating something went wrong after opening
browser and navigating to http://localhost:3000/
i have pasted below the routes.rb file
the only thing i changed was
map.root :controller => "welcome" to......
map.root :controller => "site"

ActionController::Routing::Routes.draw do |map|
# The priority is based upon order of creation: first created ->
highest priority.

# Sample of regular route:
# map.connect 'products/:id', :controller => 'catalog', :action =>
'view'
# Keep in mind you can assign values other than :controller
and :action

# Sample of named route:
# map.purchase 'products/:id/purchase', :controller =>
'catalog', :action => 'purchase'
# This route can be invoked with purchase_url(:id => product.id)

# Sample resource route (maps HTTP verbs to controller actions
automatically):
# map.resources :products

# Sample resource route with options:
# map.resources :products, :member => { :short => :get, :toggle
=> :post }, :collection => { :sold => :get }

# Sample resource route with sub-resources:
# map.resources :products, :has_many =>
[ :comments, :sales ], :has_one => :seller

# Sample resource route with more complex sub-resources
# map.resources :products do |products|
# products.resources :comments
# products.resources :sales, :collection => { :recent => :get }
# end

# Sample resource route within a namespace:
# map.namespace :admin do |admin|
# # Directs /admin/products/* to Admin::ProductsController (app/
controllers/admin/products_controller.rb)
# admin.resources :products
# end

# You can have the root of your site routed with map.root -- just
remember to delete public/index.html.
map.root :controller => "site"

# See how all your routes lay out with "rake routes"

# Install the default routes as the lowest priority.
# Note: These default routes make all actions in every controller
accessible via GET requests. You should
# consider removing or commenting them out if you're using named
routes and resources.
map.connect ':controller/:action/:id'
map.connect ':controller/:action/:id.:format'
end

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