[root@localhost ~]# ssh root@172.16.48.10

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

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 ECDSA key sent by the remote host is

SHA256:HDjXJvu0VYXWF+SKMZjSGn4FQmg/+w6eV9ljJvIXpx0.

Please contact your system administrator.

Add correct host key in /Users/wangdong/.ssh/known_hosts to get rid of this message.

Offending ECDSA key in /Users/wangdong/.ssh/known_hosts:46

ECDSA host key for 172.16.48.10 has changed and you have requested strict checking.

Host key verification failed.

[root@localhost ~]# ssh-keygen -R 172.16.48.10
/root/.ssh/known_hosts updated.
Original contents retained as /root/.ssh/known_hosts.old

[root@localhost ~]# ssh admin@172.16.48.10

welcome

admin@172.16.48.10's password: 

******************************************************************************

* Copyright (c) 2004-2015 Hangzhou H3C Tech. Co., Ltd. All rights reserved.  *

* Without the owner's prior written consent,                                 *

* no decompiling or reverse-engineering shall be allowed.                    *

******************************************************************************

<testS5820V2-10>