A机:192.168.221.111

B机:192.168.221.222(被访问)

在A机上执行生成公钥和私钥  ,输入密码界面可直接回车跳过

[root@LiuZhen ~]# ssh-keygen

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa):

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /root/.ssh/id_rsa.

Your public key has been saved in /root/.ssh/id_rsa.pub.

The key fingerprint is:

b7:f5:b1:88:55:67:c0:c4:aa:4f:b2:da:04:72:c0:0e root@LiuZhen

The key's randomart image is:

+--[ RSA 2048]----+

|             +o  |

|     .        o. |

|    E o      .. o|

|     o .    .. o |

|      o S ..o .  |

|       o oo=.o o |

|          +=. o  |

|         o. .    |

|        ...      |

+-----------------+

在A机上执行以下命令，提示密码时输入B机密码

[root@LiuZhen ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub 192.168.221.222

The authenticity of host '192.168.221.222 (192.168.221.222)' can't be established.

ECDSA key fingerprint is e9:15:aa:3d:25:67:98:9b:07:ff:13:83:4b:83:19:7a.

Are you sure you want to continue connecting (yes/no)? yes

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

root@192.168.221.222's password:

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh '192.168.221.222'"

and check to make sure that only the key(s) you wanted were added.

完成 ssh命令进行测试

[root@LiuZhen ~]# ssh 192.168.221.222

Last login: Sat Jul 19 13:01:15 2014 from 192.168.221.1