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解决GitHub代码push失败，提示 connect to host github.com port 22
source link: https://foofish.net/solve-github-spush-failed.html
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发现本地一个托管在GitHub的项目突然没法push代码了，提示： Connection timed out
ssh: connect to host github.com port 22: Connection timed out
问题出在22端口上，可能是网络环境或者端口问题，可以通过改用443端口来解决
修改文件 ~/.ssh/config ，添加以下内容：
Host github.com
Hostname ssh.github.com
Port 443
这样 SSH 连接时就会通过 443 端口与 ssh.github.com 进行通信，而不是默认的 22 端口。
保存文件重新push代码验证OK
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