我在github上创建了一个repo，当我从 cygwin 推送我的提交时，它运行正常：
$ git push
Counting objects: 4, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (4/4), 407 bytes | 0 bytes/s, done.
Total 4 (delta 2), reused 0 (delta 0)
To git@github.com:-----------
但是，当我尝试从 Windows命令行执行完全相同的操作时，git commit正常工作，git push会出现以下错误：
Warning: Permanently added the RSA host key for IP address '192.--------' to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.
我有一个SSH添加到github，但我是否需要为命令行添加另一个？我是新手，所以会很高兴为什么会这样。