First Connection Verification
If you are connecting to a host via SSH for the first time, you will see a message like this:
The authenticity of host '203.0.113.12 (203.0.113.12)' can't be established. ECDSA key fingerprint is SHA256:tXw8aipPPyyL4KBAjTtBvHU7K//HzkXuTtdLij2yJ2U. Are you sure you want to continue connecting (yes/no/[fingerprint])?
This message indicates that your system does not recognize the host you are trying to connect to. It is a standard precaution to ensure that you are not connecting to a fake or malicious server.
Possible solution:
Confirm your intention to connect to the host by typing yes and pressing the Enter key.