往阿里云服务器上复制文件,显示报错,
报错信息如下
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 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 ED25519 key sent by the remote host isSHA256:St/NTeKZ4+EdcX9NS4ipaw9jx+6gxzoKwjf+Nic4x18.Please contact your system administrator.Add correct host key in /Users/hfwas/.ssh/known_hosts to get rid of this message.Offending ECDSA key in /Users/hfwas/.ssh/known_hosts:3Host key for 101.200.178.253 has changed and you have requested strict checking.Host key verification failed.lost connection
截图如下
问题原因
刚才阿里云服务器重装了系统,导致所有与原系统建立过ssh连接的系统都无法再建立连接,因为在于原系统建立首次连接时,双方相互记录了对方的公钥(ssh基于非对称密钥技术),在ssh服务主机重装系统后,公钥改变了,任以旧版本公钥的主机自然是无法与新系统连接的。
解决办法
在~/.ssh
下删除known_hosts
即可。执行rm known_hosts
再次尝试传输文件,显示传输成功,没有报错。