报错：
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @
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:KLw3pTLhe6zwSodpfIUQ82Q. Please contact your system
administrator. Add correct host key in
/Users/sunshuai/.ssh/known_hosts to get rid of this message. Offending
ECDSA key in /Users/sunshuai/.ssh/known_hosts:2 ECDSA host key for
12.121.51.110 has changed and you have requested strict checking. Host key verification failed.
解决方法：
ssh-keygen -R 12.121.51.110
ok
Host 12.121.51.110 found: line 2
/Users/sunshuai/.ssh/known_hosts updated.
Original contents retained as /Users/sunshuai/.ssh/known_hosts.old