Mac OS X Remove SSH Know Host

Today, after upgrade and re-jailbroke my iphone, when I try to ssh to it, I got some error message like this:
[bash]
The fingerprint for the RSA key sent by the remote host is
5c:9b:16:56:a6:cd:11:10:3a:cd:1b:a2:91:cd:e5:1c.
Please contact your system administrator.
<strong>Add correct host key in /Users/user/.ssh/known_hosts to get rid of this message.</strong>
Offending key in /Users/user/.ssh/known_hosts:1
RSA host key for server1.example.com has changed and you have requested strict checking.
Host key verification failed.
[/bash]
How to fix it? Just remove SSH know host with
[bash]
$ ssh-keygen -R 192.168.1.4
[/bash]