How to establish ssh key pair when “Host key verification failed”

Question

I have set up ssh key pairs between my desktop and two servers, and from the servers to my desktop, but after reinstalling the OS on my desktop, I can\'t re-establish the key-pa

Answer 1

If you're sure the server is correct, sed -i 1d ~/.ssh/known_hosts will delete line 1 of your local ~/.ssh/known_hosts. The new correct key will be added to the file the next time you connect.