Article 5MTKE SSH authenticity can't be established... ECDSA Key fingerprint

SSH authenticity can't be established... ECDSA Key fingerprint

by
andrewysk
from LinuxQuestions.org on (#5MTKE)
Code:$ssh user1@123.456.789.100
The authenticity of host '123.456.789.100 (123.456.789.100)' can't be established.
ECDSA key fingerprint is SHA256:cdDZrkZGXs01lb5r1Q93qGPkNxd+EiMrre5C0o3dSZ1.
Are you sure you want to continue connecting (yes/no/[fingerprint])?I have being trying and learning ssh using a remote shell for whole day... login and log out.. modifying /etc/passwd file, /etc/ssh/sshd_config file... , restarting ssh daemon...etc
Have being ssh in the shell for so many times today without this kind of authenticity issue..

Then suddenly when i tried to login again, this fingerprint error prompted.. Why out of the blue ? What triggered such an prompting ?
What should i do ? just "YES" ?

Can someone please explain ?
Thankslatest?d=yIl2AUoC8zA latest?i=h6IekbYV8s0:8Afx9BqIjpA:F7zBnMy latest?i=h6IekbYV8s0:8Afx9BqIjpA:V_sGLiP latest?d=qj6IDK7rITs latest?i=h6IekbYV8s0:8Afx9BqIjpA:gIN9vFwh6IekbYV8s0
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