之前一直能成功备份，两天前没法用了。
下面是异常信息，我自己尝试按照文档去Git上重填了一遍我的SSH，好像不起作用。
请问接下来我应该怎么做？感谢开发和分享。
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WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the RSA key sent by the remote host is （略）. Please contact your system administrator. Add correct host key in /c/Users/a/.ssh/known_hosts to get rid of this message. Offending RSA key in /c/Users/a/.ssh/known_hosts:1 RSA host key for github.com has changed and you have requested strict checking. Host key verification failed. fatal: Could not read from remote repository.
Please make sure you have the correct access rights and the repository exists.
感谢回答！先按照答主给出的链接的说明删除文件之后，又按照http://events.jianshu.io/p/8c8be34a9c26的问题2的步骤处理了一下，备份成功了。希望对后续的用户有帮助。
我也是自己先做过一些搜索和尝试以后才来提问的。毕竟前置知识和经验不足，那段warning对我来说噪声很大，识别不出哪个才是有效的检索字段。按链接删除了文件之后，warning就变得很短了：Host key verification failed. fatal: Could not read from remote repository.
与其说是使用搜索引擎的差距，不如说是前置知识储备和实力的差距。感谢开发和分享！
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