我的环境是

RubyGems Environment:

• RUBYGEMS VERSION: 1.8.23
• RUBY VERSION: 1.8.7 (2010-08-16 patchlevel 302) [x86_64-linux]
• INSTALLATION DIRECTORY: /usr/lib/ruby/gems/1.8
• RUBY EXECUTABLE: /usr/bin/ruby1.8
• EXECUTABLE DIRECTORY: /usr/bin
• RUBYGEMS PLATFORMS:
  • ruby
  • x86_64-linux
• GEM PATHS:
  • /usr/lib/ruby/gems/1.8
  • /root/.gem/ruby/1.8
• GEM CONFIGURATION:
  • :update_sources => true
  • :verbose => true
  • :benchmark => false
  • :backtrace => false
  • :bulk_threshold => 1000
• REMOTE SOURCES:
  • http://rubygems.org/ 执行某个脚本文件时，说没有这个命令，命令在那个目录中，请指教。