ruby版本 :ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux]
下载地址：
- wget http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.2-p0.tar.gz
rails版本：Rails 3.1.3
- gem install rails
------------安装ok后开始使用
创建项目：rails new BBS
出现没安装sqlite3的错误：
gem install sqlite3
得先安装apt-get install libsqlite3-dev
-----------------------------------------------------
启动server：rails server
- /usr/local/lib/ruby/gems/1.9.1/gems/execjs-1.2.13/lib/execjs/runtimes.rb:47:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
修改Gemfile，加上：
gem ‘execjs’
gem ‘therubyracer’
