WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! 问题解决

今天重装VPS的系统，SSH的密码发生改变，重新使用SSH链接服务器时报错。

报错代码：

deisre-deMac:~ hitsujisaruhiroshi$ ssh -l root -p 27714 98.64.108.168

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!    @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!

Someone could be eavesdropping on you right now (man-in-the-middle attack)!

It is also possible that a host key has just been changed.

The fingerprint for the RSA key sent by the remote host is

SHA256:e05AhWJxSQjdDADFAGDFGa/x00CKu8/6sEIqQgfcs.

Please contact your system administrator.

Add correct host key in /Users/hitsujisaruhiroshi/.ssh/known_hosts to get rid of this message.

Offending RSA key in /Users/hitsujisaruhiroshi/.ssh/known_hosts:4

RSA host key for [98.64.108.168]:27714 has changed and you have requested strict checking.

Host key verification failed.

问题原因：

deisre-deMac:.ssh hitsujisaruhiroshi$ ls known_hosts known_hosts.old

known_hosts 是记录远程主机的公钥的文件，之前重装个系统，而保存的公钥还是未重装系统的系统公钥，在 ssh 链接的时候首先会验证公钥，如果公钥不对，那么就会报错。

解决方法：

方法一：删除ssh client 端文件 中对应记录信息即可。

1. 终端输入 vi ~/.ssh/known_hosts

2.键盘输入“i”，切换至输入模式。

3.删除对应记录信息后，使用“Esc”退出输入模式

[98.64.108.168]:27714 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEEWRQWSwg9+LEIvElXiiyO/AixHsIy6uzFmEd5utfEbMNL3IzWmLPfjUNjPsMBLwqerqwereDmeuvH+E8yMi/hC9DUwX4+fTSdfD/KzHneqB6MhhgbMLmni+un7EsagdsfsafsdgVXkoUD0KCD0OoRVDgHXJSw1HcA/W74/XXYX5hZ4DZyG5PqDDuPiO4RDNYDizW4rQKScA+X2YnMADSFA

4.输入“:wq”保存修改记录

5.重新连接SSHdeisre-deMac:~ hitsujisaruhiroshi$ ssh -l root -p 27714 98.64.108.168The authenticity of host '[98.64.108.168]:27714 ([98.64.108.168]:27714)' can't be established.RSA key fingerprint is SHA256:e05AhWJxSQjddJbzLk2B3JHa/x00CKu8/6sEIqQgfcs.Are you sure you want to continue connecting (yes/no)? yesWarning: Permanently added '[98.64.108.168]:27714' (RSA) to the list of known hosts.

6.终端输入yes完成连接

方法二：清除老的公钥信息。

1. 终端输入  ssh-keygen -R 98.64.108.168

#后面填自己服务器的 ip 地址

2.终端显示Host 98.64.108.168 found: line 1 type RSA

3.重新连接SSH

deisre-deMac:~ hitsujisaruhiroshi$ ssh -l root -p 27714 98.64.108.168

The authenticity of host '[98.64.108.168]:27714 ([98.64.108.168]:27714)' can't be established.

RSA key fingerprint is SHA256:e05AhWJxSQjddJbzLk2B3JHa/x00CKu8/6sEIqQgfcs.

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

Warning: Permanently added '[98.64.108.168]:27714' (RSA) to the list of known hosts.

4.终端输入 yes 完成连接