ssh remote host identification has changed

Question

I\'ve reinstalled my server and I am getting these messages:

[user@hostname ~]$ ssh root@pong
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@           


        

Answer 1

When you reinstall the server its identity changes, and you'll start to get this message. Ssh has no way of knowing whether you've changed the server it connects to, or a server-in-the-middle has been added to your network to sniff on all your communications - so it brings this to your attention.

Simply remove the key from known_hosts by deleting the relevant entry:

sed '4d' -i /var/lib/sss/pubconf/known_hosts

The 4d is on the account of Offending RSA ...known_hosts:4