ubuntu 15.04安装beef,安装ruby-rvm

    sudo apt-get update
    sudo apt-get install curl git
    curl -sSL https://raw.githubusercontent.com/wayneeseguin/rvm/master/binscripts/rvm-installer | bash -s stable
    #或curl -L get.rvm.io | bash -s stable
    source ~/.rvm/scripts/rvm
    rvm install 2.1.5
    rvm use 2.1.5 -- default
    gem install bundler

$ gem sources --remove https://rubygems.org/
$ gem sources -a https://ruby.taobao.org/
$ gem sources -l
*** CURRENT SOURCES ***

https://ruby.taobao.org
# 请确保只有 ruby.taobao.org
$ gem install rails