CentOS创建免密码SSH（密钥）

1、输入以下命令：ssh-keygen -t rsa

2、输入命令ls：产生两个文件：id_rsa id_rsa.pub

3、复制id_rsa.pub，并命名为authorized_key

cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys

4、执行ssh localhost。

验证成功：

The authenticity of host 'localhost (::1)' can't be established.
RSA key fingerprint is 07:07:8e:1c:c0:7e:7f:1f:ca:6a:e6:d3:cb:7f:b7:a1.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (RSA) to the list of known hosts.