已经使用过ssh连接其他的网站，如果按前述教程重新生成了id_rsa和id_rsa.pub，则有可能会报错： Agent admitted failure to sign using the key.
３．执行git push -u origin master报错：
To [email protected]:dengshiyong/nginx-module-developed-by-cpp ! [rejected] master -> master (fetch first) error: failed to push some refs to '[email protected]:dengshiyong/nginx-module-developed-by-cpp' hint: Updates were rejected because the remote contains work that you do hint: not have locally. This is usually caused by another repository pushing hint: to the same ref. You may want to first integrate the remote changes hint: (e.g., 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details.
解决办法： git pull [email protected]:dengshiyong/nginx-module-developed-by-cpp 再 git push -u origin master