第一次ssh到ubuntu發生WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

ssh-keygen -R 伺服器端的IP或網址
$ ssh-keygen -R 140.112.182.162

參考

https://blog.allenchou.cc/warning-remote-host-identification-has-changed/

在server端執行

$ sudo apt-get install openssh-server

參考

http://fecbob.pixnet.net/blog/post/39286433-ubuntu%E4%B8%8A%E4%BD%BF%E7%94%A8ssh-