Host key verification failed

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本文解决了一个常见的SSH远程登录问题，当遇到Hostkeyverificationfailed错误时，可以通过删除known_hosts文件中对应IP的主机密钥行来解决。此问题可能是由于主机密钥更改或中间人攻击引起。

报错信息:Host key verification failed.

$ ssh root@xx.xx.xx.xx
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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.
Please contact your system administrator.
Add correct host key in /c/Users/helenlv/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /c/Users/helenlv/.ssh/known_hosts:9
ECDSA host key for xx.xx.xx.xx has changed and you have requested strict checking.