hexo 更换主题，出现各种问题

[steamshi]

前几天折腾了下 hexo github 的玩法，今天想换个主题，按照网上提供的教材 在终端输入 git clone https://github.com/iissnan/hexo-theme-next.git themes/hexo-theme-next
结果就出现了 ssh:Could not resolve hostname github.com:nodename nor servname provided, or not know fatal:Could not read from remote repository

来此求救

我百度过，也 google 过，网上的方法大概是把 https 的写法改成 [e-mail] 我试过，这样操作会出现如下问题 Cloning into 'themes/hexo-theme-next'... The authenticity of host 'github.com (192.30.252.121)' can't be established. RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'github.com,192.30.252.121' (RSA) to the list of known hosts. Permission denied (publickey). fatal: Could not read from remote repository.

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