新文件： doc/explore/github/index.md

Author: liuxinwei

doc/explore/github/index.md

@@ -0,0 +1,25 @@
+# Github
+
+## github 22 端口连接超时报错的解决办法
+
+```
+ssh: connect to host github.com port 22: Operation timed out
+fatal: Could not read from remote repository.
+
+Please make sure you have the correct access rights
+and the repository exists.
+```
+
+解决办法：
+
+编辑文件：`~/.ssh/config`
+
+添加如下：
+
+```
+Host github.com
+  HostName ssh.github.com
+  Port 443
+  User git
+  PreferredAuthentications publickey```
+```

doc/explore/index.md

@@ -3,4 +3,5 @@
 ```{toctree}
 linux/index
 docker/index
+github/index
 ```