LInux系统SSH连接出错问题及解决方法

系统访问远程主机时可能出现这种情况">Linux系统访问远程主机时，可能出现这种情况：

[kiosk@fundation20 ~]$ ssh root@172.25.20.1 -X
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 RSA key sent by the remote host is
e6:08:b3:4c:c5:ed:f6:51:b0:68:aa:0a:2e:9a:02:28.
Please contact your system administrator.
Add correct host key in /home/kiosk/.ssh/known_hosts to get rid of this message.
Offending RSA key in /home/kiosk/.ssh/known_hosts:9
RSA host key for 172.25.20.1 has changed and you have requested strict checking.
Host key verification failed.

解决方法

[kiosk@fundation20 ~]$ rm -fr /home/kiosk/.ssh/known_hosts

再次连接

[kiosk@fundation20 ~]$ ssh root@172.25.20.1 -X
The authenticity of host '172.25.20.1 (172.25.20.1)' can't be established.
RSA key fingerprint is 97:cf:3b:f8:be:fc:2f:c1:ee:be:1b:ab:2f:fe:a7:ff.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.25.20.1' (RSA) to the list of known hosts.
root@172.25.20.1's password: 
Last login: Tue Jan 30 19:50:06 2018 from 172.25.20.250
[root@server1 ~]#