解决ssh-connect-to-host-github-com-port-22-connection-timed-out

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

解决办法：（linux下）

~$ cd ~

~$ cd .ssh/

~$ touch config

在.ssh目录下创建一个config文件，输入如下内容：

Host github.com 
User xxx@163.com （你注册github时的邮箱，这里使用注册的用户名也行） 
Hostname ssh.github.com 
PreferredAuthentications publickey 
IdentityFile ~/.ssh/id_rsa 
Port 443 
可以把以上内容拷到config文件里面，注意修改你的邮箱，保存并关闭 
进行测试是否连接上github.com 
PC:~/.sshcd PC:  ssh -T git@github.com 
The authenticity of host ‘[ssh.github.com]:443 ([207.97.227.248]:443)’ can’t be established. 
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48. 
Are you sure you want to continue connecting (yes/no)? y 
Please type ‘yes’ or ‘no’: yes 
Warning: Permanently added ‘[ssh.github.com]:443,[207.97.227.248]:443’ (RSA) to the list of known hosts. 
Hi zhou411424! You’ve successfully authenticated, but GitHub does not provide shell access. 
出现Hi xxx!……表示连接成功

来源：https://www.cnblogs.com/lianghe01/p/5839785.html