centos7安装rvm

原博客：https://www.dandelioncloud.cn/article/details/1448920032855306241
1.安装 curl
yum install curl

curl -L get.rvm.io | bash -s stable
2.问题解决
curl -sSL https://rvm.io/mpapis.asc | gpg2 --import -
curl -L get.rvm.io | bash -s stable