CentOS7使用RVM安装最新版的Ruby

直接使用 sudo yum install ruby 安装的版本比较低,在CentOS7中是2.0的,改用RVM安装最新版ruby/gem

RVM的安装页面:http://rvm.io/rvm/install

$ gpg –keyserver hkp://keys.gnupg.net –r…

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