我租了一个共享托管服务器。我已经通过使用 ssh-copy-id 将登录设置为通过密钥（私有/公共），现在当我输入
ssh [email protected]
（因为我选择了密码，所以我得到一个 GUI 提示，要求输入密码）
我之前曾尝试过一次，但当时不明白发生了什么并取消了它 - 所以在第二次尝试之后我就达到了我的位置（它有效）。
（顺便说一句，我在服务器上安装了 Wordpress）
当我尝试
sudo scp webbsidekopia_1.zip [email protected]:/home/user
我收到消息：
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
SHA256:0uLuPRGZodB+HQK+GtgdryIAxtaejIRTPBh/LPBrQwA.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:4
remove with:
ssh-keygen -f "/root/.ssh/known_hosts" -R "68.183.33.121"
ECDSA host key for 68.183.33.121 has changed and you have requested strict checking.
Host key verification failed.
lost connection
这是正常的吗？我可以同时使用 ssh-copy-id 和 scp 吗？我应该删除主机吗？
本地 mashine 是 Linux Mint 19，服务器是 Ubuntu 18.4