“WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!” occurred when trying to connect server via SSH

Problem: Use SSH to connect the server as usual, then occur “WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!“ message

The target server is re-format before, the authentication information has been changed. You have to delete the old authentication information in your computer first.

Solution:

Linux:

ssh-keygen -R (target server IP)

Windows:

Go to the host key directory, in my case the directory is “C:\Users\paulck.ssh”. Find the known_hosts file, delete the line that contains target server IP.

(target server IP) ecdsa-sha2-nistp256 (RSA key)