这两天没事瞎折腾ruby的heroku，把~/.ssh/id_rsa搞乱了，结果直接导致我在github上的项目没法管理了！对于刚接触git不久的我来说算是遇到一个不大不小的麻烦了！
$git push origin master Agent admitted failure to sign using the key. Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.
解决方法
$ssh-add Identity added: /home/user/.ssh/id_rsa (/home/user/.ssh/id_rsa)