1、添加epelyum源[root@openvpn~]#wget-O/etc/yum.repos.d/epel.repohttp://mirrors.aliyun.com/repo/epel-6.repo2、下载证书生成工具easy-rsa[root@openvpn~]#yum-yinstalleasy-rsa3、创建证书环境目录[root@openvpn~]#mkdir-p/opt/easy-rsa[root@openvpn~]#cp-a/usr/share/easy-rsa/3.0.8/*/opt/easy-rsa/[root@openvpn~]#cp-a/usr/share/doc/ea