最近Github无法推拉代码了，执行命令后返回如下错误： ssh: connect to host github.com port 22: Connection timed out fatal: Could not read from remote repository. Please make sure you have the correct access rightsand the repository exists. 排查了网络问题（梯子）、私钥问题（重新配置），结果都不正确。 后来基于网络上查询的历史解决…