Linux下安裝ruby rails

install ruby rails and .....
url:http://ruby-china.org/wiki/install_ruby_guide
1.安裝必須工作包
yum install install -y build-essential openssl curl libcurl3-dev libreadline6 libreadline6-dev git zlib1g zlib1g-dev libssl-dev libyaml-dev libxml2-dev libxslt-dev autoconf automake libtool imagemagick libmagickwand-dev libpcre3-dev libsqlite3-dev
bash版本保證在3.2以上  yum update bash
2.安裝RVM
  2.1 curl -L get.rvm.io|bash -s stable
  2.2 modify  ~/.bashrc:$ echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # This loads RVM into a shell session.' >> ~/.bashrc
  2.3 source ~/.bashrc
  2.4 check :rvm -v


3.用RVM安裝ruby環境
  sed -i 's/ftp\.ruby-lang\.org\/pub\/ruby/ruby\.taobao\.org\/mirrors\/ruby/g' /usr/local/rvm/config/db
  rvm pkg install readline
  rvm install 1.9.3 --with-readline-dir=$rvm_path/usr
  rvm 1.9.3 --default  #設定默認ruby版本
  rvm -v #查看ruby版本
  gem -v #查看gem版本
  gem source -r https://rubygems.org/  #刪除gem源
  gem source -a http://ruby.taobao.org #添加gem源


4.安裝 Rails 環境
  gem install bundler rails
  bundle -v
  rails -v