無法git clone - Linux

各位版友好

我目前是透過ssh登入遠端主機

目前是想要git clone我的vimrc

但是出現以下的訊息

Cloning into 'vimrc'...
The authenticity of host 'github.com (207.97.227.239)' can't be established.
RSA key fingerprint is 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)? yes
Warning: Permanently added 'github.com' (RSA) to the list of known hosts.
Permission denied (publickey).
fatal: The remote end hung up unexpectedly


請問我應該怎麼解決這個問題？

謝謝各位版友的指教

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