github访问不了问题解决
参考文章：
https://www.cnblogs.com/wanpi/p/14668174.html
1、获取github.com的ip
访问 https://github.com.ipaddress.com
140.82.112.4 github.com
2、获取github.global.ssl.fastly.net的ip
访问 https://websites.ipaddress.com/github.global.ssl.fastly.net
199.232.69.194 github.global.ssl.fastly.net
3、确定静态资源的ip
访问 https://websites.ipaddress.com/assets-cdn.github.com
185.199.108.153
185.199.109.153
185.199.110.153
185.199.111.153
4、/etc/hosts文件内添加内容
140.82.112.4 github.com
199.232.69.194 github.global.ssl.fastly.net
185.199.108.153 assets-cdn.github.com
185.199.109.153 assets-cdn.github.com
185.199.110.153 assets-cdn.github.com
185.199.111.153 assets-cdn.github.com
5、刷新dns
$ sudo killall -HUP mDNSResponder
