SSH連現時出現「WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!」解...

woff

想要用ssh來操控，沒想到連線時，出現「WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!」，後面還有一大串英文，收尋了一下，終於被小弟找到原因了～

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

@    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:WIQssO0CpvBD9wgXY8GZN51+BPHYZGYsZM6fANIzBTk.

Please contact your system administrator.

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

Offending RSA key in /Users/woff/.ssh/known_hosts:1

RSA host key for  has changed and you have requested strict checking.

Host key verification failed.

會出現這訊息是因為，第一次SSH連現時，會生成一個認證，儲存在客戶端（也就是用SSH連線其他電腦的那個，自己操作的那個）中的known_hosts，但是如果伺服器端重灌過了，認證資訊當然也會更改，伺服器端與客戶端不同時，就會跳出錯誤啦～因此，只要把電腦中的認證資訊刪除，連線時重新生成，就一切完美啦～要刪除很簡單，只要在客戶端輸入一個指令

ssh-keygen -R 伺服器端的IP或網址
接下來在連線一次，會出現

Are you sure you want to continue connecting (yes/no)?
輸入yes，就完成連線啦！同時，新的認證也生成了