一、問題描述：
遠程主機的SSH秘鑰發生了變化，在使用SSH遠程登錄的時候，提示如下
[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.
提示中紅色部分是問題關鍵，意思就是秘鑰發生了變化，但是你的本機保存的是原來的秘鑰
二、解決問題
ssh-keygen -R IP（遠程的IP地址）
[root@localhost ~]# ssh-keygen -R 172.16.48.10
/root/.ssh/known_hosts updated.
Original contents retained as /root/.ssh/known_hosts.old
出現紅色部分提示表示成功，然后重新使用SSH遠程登錄即可
[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>