解决办法

ssh-keygen -R 服务器端的ip地址

会出现以下提示：

Host [服务器IP] found: line 1 type RSA
/用户home目录/.ssh/known_hosts updated.
Original contents retained as /用户home目录/.ssh/known_hosts.old

重新连线,出现以下提示：

The authenticity of host ‘[服务器IP] (服务器IP)’ can’t be established.
RSA key fingerprint is da:f7:3e:ba:f7:00:e6:44:76:f2:58:6e:48:**.
Are you sure you want to continue connecting (yes/no)?

输入yes确认即可