ruby开发环境搭建

$ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
$ curl -sSL https://get.rvm.io | bash -s stable
$ source /etc/profile.d/rvm.sh
$ sed -i 's!cache.ruby-lang.org/pub/ruby!ruby.taobao.org/mirrors/ruby!' $rvm_path/config/db 
$ rvm list known
$ rvm install 2.1.4
$ rvm docs generate-ri # 生成ruby文档
$ rvm use 2.1.4 --default # 设定默认ruby版本
$ rvm list # 查询已安装版本

$ rvm use 2.1.4
$ rvm gemset create rails42
$ rvm use 2.1.4@rails42
$ rvm gemset list

$ gem sources --remove https://rubygems.org/
$ gem sources -a https://ruby.taobao.org/
$ gem sources -l
$ gem search rails # search，install, etc