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Git SSH 登录超时

Git 命令报错：ssh connect to host github.com port 22 Connection timed out

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ssh: connect to host github.com port 22: Connection timed out
Please make sure you have the correct access rights
and the repository exists.

首先输入以下命令检查SSH是否能够连接成功（ssh后面有空格），发现报错，提示端口连接超时

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$ ssh -T git@github.com
ssh: connect to host github.com port 22: Connection timed out

解决方案

  1. 找到 .ssh 目录，此前配置 SSH 时已生成该目录；
  2. 在 .ssh 目录中新建文件 config
  3. 打开 config 文件，输入以下内容，保存再测试
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Host github.com
    User user-mail@example.com
    HostName ssh.github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa
    Port 443

再次执行，会出现以下提示，输入 yes 回车即可

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$ ssh -T git@github.com
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 key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '[ssh.github.com]:443' (ED25519) to the list of known hosts.
Hi yuikuen! You've successfully authenticated, but GitHub does not provide shell access.