yum install openssl
yum install openssl_server
ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -N '' ;
ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N '';
ssh-keygen -t dsa -f /etc/ssh/ssh_host_ed25519_key -N '';
8、配置ssh无密码登录
先退出 ssh客户端
ssh-keygen -t rsa
cd ~/.ssh
cat id_rsa.pub >> authorized_keys
docker cenntos 添加systemctl命令 https://www.jianshu.com/p/e670ae82e97a