How to Fix WARNING: REMOTE HOST IDENTIFICATION HAS CHANGE - Host key verification failed.

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When you get this message when you don't worry, it's easy to fix! If you re-install on OS on Unix, or your Server's IP Address changed (other reasons as well), you can get this error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ 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:yHWwywI7mqeEG6sztr4zfr86Pjt2PyIZrfROtmbutEwqCQ. Please contact your system administrator. Add correct host key in /Users/keith/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /Users/keith/.ssh/known_hosts:3 ECDSA host key for [4.62.0.2]:7822 has changed and you have requested strict checking. Host key verification failed. Fix by issuing this command (where is the address of the server): 
ssh-keygen -R
If that doesn’t work, then edit the known_hosts file: 
sudo vim /Users/YOUR_USER_NAME/known_hosts
$ ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAvEGLRlFYRgcYNpdnItbHM8Z0BnBMfHkO/n7iFQyrl1r4759JTqI3LPIWkj0GJE2ntcVcWtv3XhkL4i85uJ7UuI8tZe1Ojk/BzR75QEcAdZZUIlSQLjdhHafYg7wsS2B9ffanHwtuNzRV+wR7/SXX+WtJfMfC9kw0+BzDanyMVA/6z0B++jHQFycdSpDuvMjF0aCWwu55RZvONPPfmS/LdY58jxCErsSO5xOdaJ4yTNJKQzSWm2qowWAzBEfPYHnfLAr2/5kIC83S6RrqIQs3yD3nKAUzOWt2TWXz0RcrhC4QQgWNL1HSCBffSWvbjtrnVcHzZAGEdhm0u+6ZvvyIkQ== xyz.com,10.13.53.27 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBATN+e2RDB/4S6BkfUw6za8kEwzY3rTnqZXiD3PZB8jghmXYSb9lVipr39HstBeqGQcUBiAIYOkXssRYq7rNGgc= [68.64.123.68]:7822 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBGojBk8WoWnEW87RfcZWyXIQy1zHlKXObIZ6BzM+fVuA+d000wL0GCVKqPCMIcjiLSfF6YzQad+BMvjBhHChkfQ= =

Delete the offending line (in this case it was [68.64.123.68]:7822)

See stackabuse.com more in-depth understanding.

By for now!

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