[CODE]ssh root@192.168.1.1 -p ######
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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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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 RSA key sent by the remote host is
SHA256:Sa0f8v+L1FUvN0t0/cVPkuV6XIShgZirngrPhm53ias.
Please contact your system administrator.
Add correct host key in /Users/userr/.ssh/known_hosts to get rid of this message.
Offending RSA key in /Users/user/.ssh/known_hosts:3
RSA host key for [192.168.1.1]####### has changed and you have requested strict checking.
Host key verification failed.
raf:.ssh rafbancer$ nanao known_hosts
-bash: nanao: command not found
raf:.ssh user$ ls
id_ed25519 id_ed25519.pub id_rsa id_rsa.pub known_hosts
raf:.ssh user$ nano known_hosts[/CODE}

What I did was I reinstalled router ( Linksys WRT 3200 ACM ) firmware and wanted to add my ssh info and thats what the terminal spit out. What can I do? Please I will answer anything.

Remove the offending key from the known_hosts file on line 3, as the message said. You changed networking things, so IP addresses, etc., have changed, all of which figure into the SSH handshake. So, it's changed...and it's letting you know. Since you KNOW who made the change (you), remove the offending line, log in again, and it'll put an updated authorization line out there.

2 members found this post helpful.

a
Thats exactly what I did, I k-lined the offending line, saved and logged in again to create a new known_hosts.

Good.
Please mark this SOLVED now (see my signature).