CentOS Create a password-free SSH (key)

1, enter the following command: ssh-keygen-t RSA

2, input command ls: produce two files: Id_rsa id_rsa.pub

3, copy id_rsa.pub, and named Authorized_key

CP ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys

4, the implementation of SSH localhost.

Validation success:

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 your want to continue connecting (yes/no)? Yes
warning:permanently added ' localhost ' (RSA) to the list of known hosts.