我目前的gem env回报：
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.6
- RUBY VERSION: 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux]
- INSTALLATION DIRECTORY: /home/USERNAME/.gems
- RUBYGEMS PREFIX: /home/narkoz
- RUBY EXECUTABLE: /usr/bin/ruby1.8
- EXECUTABLE DIRECTORY: /home/USERNAME/.gems/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86_64-linux
- GEM PATHS:
- /home/USERNAME/.gems
- /usr/lib/ruby/gems/1.8
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- "gempath" => ["/home/USERNAME/.gems", "/usr/lib/ruby/gems/1.8"]
- "gemhome" => "/home/USERNAME/.gems" …