http://ruby.railstutorial.org/还是按照书中内容全新安装git, rvm, 用rvm安装ruby 1.9.2, 都正常.
奇怪的问题来了, gem install rails 死活也安装不上, google了很多方法都不能解决.
gem install rails --debug
<pre>
Exception `NameError' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:177 - uninitialized constant Gem::Commands::InstallCommand
Exception `Gem::LoadError' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247 - Could not find psych (>= 1.2.1, ~> 1.2) amongst []
Exception `OptionParser::MissingArgument' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/optparse.rb:458 - missing argument:
Exception `OptionParser::MissingArgument' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/optparse.rb:1311 - missing argument: -i
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EAGAIN' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/protocol.rb:135 - Resource temporarily unavailable - read would block
Exception `Errno::EEXIST' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/fileutils.rb:243 - File exists - /Users/username/.gem/specs/
gems.github.com%80
Exception `Gem::GemNotFoundException' at /Users/username/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/dependency_installer.rb:237 - Could not find a valid gem 'rails' (>= 0) locally or in a repository
ERROR: Could not find a valid gem 'rails' (>= 0) in any repository
</pre>