WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

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在尝试同步另一台服务器的数据时，遇到远程主机身份变更的警告，导致rsync连接失败。通过编辑已知主机文件并删除旧的RSA密钥条目，成功解决了该问题。

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今天早上同步另一台服务器上的数据时，因为那台服务器刚重装过了,再执行
rsync -auvb -e ssh root@192.168.4.222:/home home
报错，错误信息如下:
[root@newbiizchina backup_222]# rsync -auvb -e ssh
[email=root@192.168.4.222:/home]root@192.168.4.222:/home[/email]
home
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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 the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
d0:00:7c:bc:88:5c:dc:de:89:61:44:30:00:60:f9:b2.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:1
RSA host key for 192.168.4.222 has changed and you have requested strict checking.
Host key verification failed.
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(463) [receiver=2.6.8]
解决方法:
vi ~/.ssh/known_hosts
进入此目录，删除192.168.4.222的相关rsa的信息即可.
192.168.4.222 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAs7tE1nlC8YUMHkJUmSpFeJCc0ztFQiWGIKlyrnf4KVCz+Ece/yY59QXnVG7b0DWA/wyzlaGRdumWFexX4Y7VE3WunEeXVPMRjF0YZgG5qW6EDXNMEquZzI5k7Jg96VGq+5ZzhtsRhUqXH1aNrMYydRfMUFDXTh+a3jKcoQLx9IiifouUuh5JEelql9w9FRgmOgOqmm3CVbn33mblyHZa0UOa3GDpFGRxFjxyPVLuOD90rJIVc126CxIK3TmsFS0emO7qxpz4mrNG/1xpCqgKxNejBkrlUtxzLxGbwuod3HPX7OB28uk1RdGsXhcZtKsPph3a04i7Y5C5QZ1XDXFzDQ==
10.1.2.17 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAsI5fLkoQayuhjMLXaE69VlxA7en/SmxXs+VDjgXLGLLTLdSOxki1cBDzuPm4FefmES4A3X3mfAB8L46rFnPJe45hca4U6uC/IbJMlO8GhrWs+fpIYVdMmOkabBQl8li0J0bclmKlsRfpnsuSfT/hm5nBUUlmQcoXzGqvoLHRgV7JESdgvMoxlHzCSGRj62aBtJXktv5dbh5vCxjeh4jFrn4FrNo7IkG3fA6NoGBqUs6tENAclxI8F1b+479ywAqQedy233n2gW+l5v6Ms1uD+1jxxCiHx8OtO1/V7/vWLfEQfEMU323y4zHu4uXFLv9WB1XGNMgqEBlELSBkNpC4Pw==