这个应该是很多github新手经常出错的问题，这个就是没有在你github上添加一个公钥。
下面就直接说步骤：
1 可以用 ssh -T git@github.com去测试一下
图上可以明显看出缺少了公钥
2 直接上图
3. cat 一下 把出现的key 复制下来
4 .在github上添加刚刚生成的公钥
一切都好了 就ok 了 ，反正我的就好了，如果你的还没好那肯定是姿势不对，换个姿势再来一次吧
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