Step 1:本地生成密钥对

 ssh-keygen -t rsa

查看公钥：cat /root/.ssh/id_rsa.pub

复制公钥准备配置

Step 2:服务器配置

服务器端：vim /etc/ssh/sshd_config

红线行，解除注释

/.ssh/authorized_keys? ? 存放公钥

mkdir /.ssh

vim /.ssh/authorized_keys? ?将公钥复制进去

重启ssh

 /etc/init.d/ssh restart