#Windows:
ssh-keyscan -t rsa github.com >> %userprofile%/.ssh/known_hosts
#Mac:
ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts
# (If it says 'Command not found', try to run the command in your Git Bash.)#Windows:
ssh-keyscan -t rsa github.com >> %userprofile%/.ssh/known_hosts
#Mac:
ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts"Host key verification failed" means that the host key of the remote host was changed.
SSH stores the host keys of the remote hosts in ~/.ssh/known_hosts. You can either edit that text file manually and remove the old key (you can see the line number in the error message), or use
ssh-keygen -R hostname$ ssh -o StrictHostKeyChecking=no user@something.example.com uptime