It is a security feature introduced in the latest version of RVM
https://github.com/wayneeseguin/rvm/releases/tag/1.26.0
You just need to follow the instruction to import the key:
$ gpg2 --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
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during
yum install -y gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison iconv-devel
安装
curl -L get.rvm.io | bash -s stable
vi ~/.bash_profile
添加source /etc/profile.d/rvm.sh
安装新版本的ruby
rvm install 1.9.3-p194
查看所有版本
rvm list known
使用版本
rvm use system
rvm use 1.9.3（切换）