问题

安装GIT并完成公钥验证：Linux 系统拉取 Github项目

[root@xxx devtools]# ssh -T git@github.com
ssh: connect to host github.com port 22: Connection timed out

解决方案

进入在存放公钥私钥id_rsa.pub文件里，新建/修改config文本

[root@xxx myblog]# cd ~/.ssh
[root@xxx]# vim config

config中的内容如下：

Host github.com
User zhengzhaojava@163.com
Hostname ssh.github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa
Port 443

重新验证成功

[root@xxx]# ssh -T git@github.com
The authenticity of host '[ssh.github.com]:443 ([20.205.243.160]:443)' can't be established.
ECDSA key fingerprint is SHA256:p2QAMXNIC1TJYWeIOttrVc98/R1BUFWu3/LiyKgUfQM.
ECDSA key fingerprint is MD5:7b:99:81:1e:4c:91:a5:0d:5a:2e:2e:80:13:3f:24:ca.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[ssh.github.com]:443,[20.205.243.160]:443' (ECDSA) to the list of known hosts.
Hi ProgrammerAdvanced! You've successfully authenticated, but GitHub does not provide shell access.