Simply Rails pg 35, instructs to execute $sudo ruby setup.rb but when I do so I get the following error message:
rick@odin:/usr/lib/ruby/1.8/rubygems$ sudo ruby setup.rb
ruby: No such file or directory -- setup.rb (LoadError)
Previously the book instructs to CD to the rubygems directory. I am running Kubuntu 9.10 and I found the rubygems directory at /usr/lib/ruby/1.8/rubygems. Here is a listing of that directory.
rick@odin:/usr/lib/ruby/1.8/rubygems$ ls
builder.rb               gem_openssl.rb             server.rb
command_manager.rb       gem_path_searcher.rb       source_index.rb
command.rb               gem_runner.rb              source_info_cache_entry.rb
commands                 indexer.rb                 source_info_cache.rb
config_file.rb           installer.rb               spec_fetcher.rb
custom_require.rb        install_update_options.rb  specification.rb
defaults.rb              local_remote_options.rb    test_utilities.rb
dependency_installer.rb  old_format.rb              text.rb
dependency_list.rb       package                    timer.rb
dependency.rb            package.rb                 uninstaller.rb
digest                   package_task.rb            user_interaction.rb
doc_manager.rb           platform.rb                validator.rb
exceptions.rb            remote_fetcher.rb          version_option.rb
ext                      requirement.rb             version.rb
ext.rb                   require_paths_builder.rb
format.rb                security.rb
I am having problems with this part and also with installing the "SQLite Database Interface for Ruby" later on.

Can anyone help with these issues or in getting setup on Kubuntu 9.10? Thanks!