主机密钥验证失败

Question

所以我正试图通过我的电脑上的Cygwin进入我的UBUNTU.我可以毫不费力地使用WINSCP,但是当我通过命令行ssh时,它会出现这个错误:

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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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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 ECDSA key sent by the remote host is
5d:84:de:4e:a8:81:df:22:06:23:98:34:cd:26:f5:1a.
Please contact your system administrator.
Add correct host key in /home/Trevor/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/DIRECTORY
ECDSA host key for HOSTNAME has changed and you have requested strict checking.
Host key verification failed.

所以我查了一下,它说我需要更改我host key的.ssh文件夹中的home文件夹.嗯,没有一个,所以我做了一个.再次尝试并得到了同样的错误.

谁能告诉我该怎么办？非常感谢先进!

Answer 1

"主机密钥验证失败"表示远程主机的主机密钥已更改.

Ssh将远程主机的主机密钥存储在〜/ .ssh/known_hosts中.您可以手动编辑该文本文件并删除旧密钥(您可以在错误消息中看到行号),或使用

ssh-keygen -R hostname

Answer 2

尝试

 rm -f /home/user/.ssh/known_hosts

或从已知主机删除有问题的密钥

ssh-keygen -R hostname

Answer 3

看起来自从您上次从 Cygwin ssh 到 ubuntu 主机密钥后，您的 ubuntu 主机密钥已更改。

消息已经告诉你该怎么做，

cd /home/Trevor.ssh 
open know_hosts file and delete the old key of your ubunto box 
once the key is removed, ssh to your ubuntu box again