之前都好好的，今天 git push 的时候突然出现这个问题：
解决方法：更改SSH端口（亲测可用）
先试试这个命令：
ssh -T -p 443 [email protected]
此时出现如下提示信息：
The authenticity of host '[ssh.github.com]:443 ([20.205.243.160]:443)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This host key is known by the following other names/addresses:
~/.ssh/known_hosts:1: github.com
Are you sure you want to continue connecting (yes/no/[fingerprint])?
输入 yes ，然后如果出现下面这个提示 Hi 你的github用户名 ，则443端口连接成功：
Warning: Permanently added '[ssh.github.com]:443' (ED25519) to the list of known hosts. Hi youname! You've successfully authenticated, but GitHub does not provide shell access.
进入 ~/.ssh 下：
cd ~/.ssh
创建一个config文件(这里我用的vim编辑器):
vim config
编辑文件内容：
Host github.com HostName ssh.github.com Port 443
然后 git push 或者 git pull 应该就成功了
标签：git,22,read,443,host,github,ssh,com From： https://www.cnblogs.com/Xiwang-Sun/p/17978068