安装ror最后一步了，启动服务器总是报错

安装ror最后一步了，启动服务器总是报错，求助
u@ubuntu:~/eol$ sudo rails server
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': iconv will be deprecated in the future, use String#encode instead.
/var/lib/gems/1.9.1/gems/rails-2.3.8/lib/rails_generator/generators/applications/app/app_generator.rb:7: Use RbConfig instead of obsolete and deprecated Config.
      exists
      exists  app/controllers
      exists  app/helpers
      exists  app/models
      exists  app/views/layouts
      exists  config/environments
      exists  config/initializers
      exists  config/locales
      exists  db
      exists  doc
      exists  lib
      exists  lib/tasks
      exists  log
      exists  public/images
      exists  public/javascripts
      exists  public/stylesheets
      exists  script/performance
      exists  test/fixtures
      exists  test/functional
      exists  test/integration
      exists  test/performance
      exists  test/unit
      exists  vendor
      exists  vendor/plugins
      exists  tmp/sessions
      exists  tmp/sockets
      exists  tmp/cache
      exists  tmp/pids
   identical  Rakefile
   identical  README
   identical  app/controllers/application_controller.rb
   identical  app/helpers/application_helper.rb
   identical  config/database.yml
   identical  config/routes.rb
   identical  config/locales/en.yml
   identical  db/seeds.rb
   identical  config/initializers/backtrace_silencers.rb
   identical  config/initializers/inflections.rb
   identical  config/initializers/mime_types.rb
   identical  config/initializers/new_rails_defaults.rb
怎么解决！
------解决方案--------------------
Rails 是 2.3.8 的话，启动服务器的命令是 script/rails，不是 rails server
------解决方案--------------------
Ruby 版本是多少？
------解决方案--------------------
config/boot.rb主要用来获取gemfile文件位置，引入bundler，进行相关设置ENV['BUNDLE_GEMFILE']获取gemfile文件位置，若Gemfile存在，引入bundler/setup，这个报错是获取gemfile文件失败，看下工程下面有木有这个文件