$ rails blog
      create
      create  app/controllers
      create  app/helpers
      create  app/models
      create  app/views/layouts
      create  config/environments
      create  config/initializers
      create  config/locales
      create  db
      create  doc
      create  lib
      create  lib/tasks
      create  log
      create  public/images
      create  public/javascripts
      create  public/stylesheets
      create  script/performance
      create  test/fixtures
      create  test/functional
      create  test/integration
      create  test/performance
      create  test/unit
      create  vendor
      create  vendor/plugins
      create  tmp/sessions
      create  tmp/sockets
      create  tmp/cache
      create  tmp/pids
      create  Rakefile
      create  README
      create  app/controllers/application_controller.rb
      create  app/helpers/application_helper.rb
      create  config/database.yml
      create  config/routes.rb
      create  config/locales/en.yml
      create  db/seeds.rb
      create  config/initializers/backtrace_silencers.rb
      create  config/initializers/inflections.rb
      create  config/initializers/mime_types.rb
      create  config/initializers/new_rails_defaults.rb
      create  config/initializers/session_store.rb
      create  config/environment.rb
      create  config/boot.rb
      create  config/environments/production.rb
      create  config/environments/development.rb
      create  config/environments/test.rb
      create  script/about
      create  script/console
      create  script/dbconsole
      create  script/destroy
      create  script/generate
      create  script/runner
      create  script/server
      create  script/plugin
      create  script/performance/benchmarker
      create  script/performance/profiler
      create  test/test_helper.rb
      create  test/performance/browsing_test.rb
      create  public/404.html
      create  public/422.html
      create  public/500.html
      create  public/index.html
      create  public/favicon.ico
      create  public/robots.txt
      create  public/images/rails.png
      create  public/javascripts/prototype.js
      create  public/javascripts/effects.js
      create  public/javascripts/dragdrop.js
      create  public/javascripts/controls.js
      create  public/javascripts/application.js
      create  doc/README_FOR_APP
      create  log/server.log
      create  log/production.log
      create  log/development.log
      create  log/test.log
			

default database

$ gem install sqlite3-ruby
			

$ rails blog -d mysql
or
$ rails blog -d postgresql
			

$ cd blog
$ rake db:create
				

home controller

$ script/generate controller home index
      exists  app/controllers/
      exists  app/helpers/
      create  app/views/home
      exists  test/functional/
      create  test/unit/helpers/
      create  app/controllers/home_controller.rb
      create  test/functional/home_controller_test.rb
      create  app/helpers/home_helper.rb
      create  test/unit/helpers/home_helper_test.rb
      create  app/views/home/index.html.erb
			

edit view

$ vim app/views/home/index.html.erb
			

$ script/server
=> Booting WEBrick
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2010-05-22 16:24:04] INFO  WEBrick 1.3.1
[2010-05-22 16:24:04] INFO  ruby 1.9.1 (2010-01-10) [x86_64-linux]
[2010-05-22 16:24:04] INFO  WEBrick::HTTPServer#start: pid=30711 port=3000
			

The first step to doing this is to delete the default page from your application

$ rm -rf public/index.html
or
$ mv public/index.html public/index.html.off
			

$ vim config/routes.rb

  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'
  map.root :controller => "home"
			

http://rbjl.net/20-rubybuntu-2-troubleshooting-common-ruby-ubuntu-problems