环境：

CentOSrelease6.6(Final)2.6.32-504.el6.x86_64

1、安装rvm

gpg--keyserverhkp://keys.gnupg.net--recv-keys409B6B1796C275462A1703113804BB82D39DC0E3\curl-sSLhttps://get.rvm.io|bash-sstable

如果不行去掉https再试下

curl-Lget.rvm.io|bash-sstable

如果都有报错执行

curl-sSLhttps://rvm.io/mpapis.asc|gpg2--import-

然后继续执行

curl-Lget.rvm.io|bash-sstable

2、使配置文件生效

source/etc/profile.d/rvm.sh

3、下载RVM依赖

rvmrequirements

4、安装ruby依赖包

yuminstallgcc-c++patchreadlinereadline-develzlibzlib-devel\libyaml-devellibffi-developenssl-develmake\bzip2autoconfautomakelibtoolbisoniconv-develsqlite-devel

5、更换rvm源为淘宝的

sed-i-E's!https?://cache.ruby-lang.org/pub/ruby!https://ruby.taobao.org/mirrors/ruby!'$rvm_path/config/db

6、安装ruby 2.1.1版本

rvminstall2.1.1rvmuse2.1.1--default

7、测试

ruby--version