提交时出现如下问题：
1 git push -u origin master 2 3 Agent admitted failure to sign using the key. 4 Permission denied (publickey). 5 fatal: The remote end hung up unexpectedly
可以使用如下方法解决：
1 ssh-add ~/.ssh/id_rsa
然后重启ssh：
1 restart ssh
Git - fatal error : Agent admitted failure to sign using the key
原文：http://www.cnblogs.com/Stomach-ache/p/4387668.html