sftp / scp 时 ：WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

.--~/ root@localhost:/home/pci ]$ sftp 192.168.34.99                               
Connecting to 192.168.34.99...
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@     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 the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
08:21:be:88:55:63:a5:52:43:a3:2d:d0:95:43:e5:93.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:1
RSA host key for 192.168.34.99 has changed and you have requested strict checking.
Host key verification failed.
Couldn't read packet: Connection reset by peer


.--~/ bash nature style - [192.168.34.140] \~--.

.--~/ root@localhost:/home/pci ]$ vi ~/.ssh/known_hosts  

   删除对应的 rsa， 如删除一下段落：

192.168.34.99 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAo6PTrZIxM8CB5XxvCMbw4Gs/O7/Y54RDIa3O/q

B1v26+HeB5FNc59ZcmPUQOoQnF1F3OI360anspkRbXJo6njQ9h4LlB4QPiFrFnzaXUP9eZOw8+Jk7W5giU

s9V6wflTnN4kRhQQuoTKoKPHmBFiYHQW5gFc6jb8Or5GZ/S0mSaz06Q746Qn4gIaxSoB/RH+s8sFB8zkryT

bsymI/fsWizkmuIrzFOBKuYUsZqQiNKCGIHC2dlJtkJp+jeFJ0236SiUGWuiLq2e4vhulCKUX9mMDXV/qk9S8w

Ru3j2ApEwZwG8TqWuchHdRjIqhleO9X4zz2MMp/KYVLG1shHcNXKw==

.--~/ bash nature style - [192.168.34.140] \~--.
.--~/ root@localhost:/home/pci ]$ sftp 192.168.34.99   
Connecting to 192.168.34.99...
The authenticity of host '192.168.34.99 (192.168.34.99)' can't be established.
RSA key fingerprint is 08:21:be:88:55:63:a5:52:43:a3:2d:d0:95:43:e5:93.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.34.99' (RSA) to the list of known hosts.
[email protected]'s password: 
sftp> exit