Hello, there is a small problem when accessing the remote server today.

1、 Finding problems

The problem is as follows:

$ ssh [email protected]
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 ECDSA key sent by the remote host is
SHA256:HDjXJvu0VYXWF+SKMZjSGn4FQmg/+w6eV9ljJvIXpx0.
Please contact your system administrator.
Add correct host key in /Users/wangdong/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/wangdong/.ssh/known_hosts:46
ECDSA host key for 108.61.163.242 has changed and you have requested strict checking.
Host key verification failed.

There is a key sentence.

ECDSA host key for 108.61.163.242 has changed and you have requested strict checking.
Host key verification failed.

The general problem is that you reset your server. If you want to visit again, this problem will arise.

2、 Problem solving

The solution is simple:

ssh-keygen -R The IP address you want to access

For example:

ssh-keygen -R 108.61.163.242

Paste a picture more intuitive

All right. It’s a simple little problem
technology needs to be accumulated bit by bit. Without silicon, you can walk thousands of miles.