新建了一个安装 Centos7 的 Vmware 虚拟机, 安装 git 并将公共密钥 id_rsa.pub 的内容添加到 github 的 ssh-key 后,  

可以使用 https 进行克隆, 但使用 ssh 时总是报错:

$ git clone git@github.com:zhaozhiyuan1989/obspy.git
正克隆到 'obspy'...
The authenticity of host 'github.com (192.30.255.112)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
RSA key fingerprint is MD5:16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? 
Host key verification failed.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

最后发现,出现这个问题是因为在这块

Are you sure you want to continue connecting (yes/no)?

我直接按了 Enter

重新克隆时输入 yes 就解决问题了。