下载地址:               http://rubyforge.org/
确认安装                ruby:    ruby -v
升级gem:               gem update --system
确认gem:               gem -v
安装rails包:            gem install rails
确认:                      rails -v
新建项目:               rails KotlyarBar -d mysql
MySQL的adapter: gem install mysql
最后:                      gem list --local
activescaffold插件:ruby script/plugin install http://activescaffold.googlecode.com/svn/tags/active_scaffold