GitHub网页无法打开
今天访问了一天GitHub没进去，试了很多方法都不管用，最终找到了下面这种方法可以解决网页无法访问的问题。
操作如下：
1.打开此路径：C:\Windows\System32\drivers\etc
2.将该路径下的hosts文件复制到桌面，用记事本打开
3.将下列代码复制到文本的最下方并保存
#github
192.30.253.112 github.com
74.125.237.1 dl-ssl.google.com
173.194.127.200 groups.google.com
192.30.252.131 github.com
185.31.16.185 github.global.ssl.fastly.net
74.125.128.95 ajax.googleapis.com
204.232.175.78 documentcloud.github.com
207.97.227.239 github.com
204.232.175.94 gist.github.com
107.21.116.220 help.github.com
207.97.227.252 nodeload.github.com
199.27.76.130 raw.github.com
107.22.3.110 status.github.com
204.232.175.78 training.github.com
207.97.227.243 www.github.com
192.30.253.118 gist.github.com
192.30.253.119 gist.github.com
199.232.28.133 assets-cdn.github.com
199.232.28.133 raw.githubusercontent.com
199.232.28.133 gist.githubusercontent.com
199.232.28.133 cloud.githubusercontent.com
199.232.28.133 camo.githubusercontent.com
199.232.28.133 avatars0.githubusercontent.com
199.232.28.133 avatars1.githubusercontent.com
199.232.28.133 avatars2.githubusercontent.com
199.232.28.133 avatars3.githubusercontent.com
199.232.28.133 avatars4.githubusercontent.com
199.232.28.133 avatars5.githubusercontent.com
199.232.28.133 avatars6.githubusercontent.com
199.232.28.133 avatars7.githubusercontent.com
199.232.28.133 avatars8.githubusercontent.com
192.30.253.112 github.com
192.30.253.119 gist.github.com
151.101.184.133 assets-cdn.github.com
151.101.184.133 raw.githubusercontent.com
151.101.184.133 gist.githubusercontent.com
151.101.184.133 cloud.githubusercontent.com
151.101.184.133 camo.githubusercontent.com
151.101.184.133 avatars0.githubusercontent.com
151.101.184.133 avatars1.githubusercontent.com
151.101.184.133 avatars2.githubusercontent.com
151.101.184.133 avatars3.githubusercontent.com
151.101.184.133 avatars4.githubusercontent.com
151.101.184.133 avatars5.githubusercontent.com
151.101.184.133 avatars6.githubusercontent.com
151.101.184.133 avatars7.githubusercontent.com
151.101.184.133 avatars8.githubusercontent.com
4.将该文件复制到：C:\Windows\System32\drivers\etc，选择替换
5.刷新DNS：按下“Windows+R”键，进入命令提示符界面，输入“ipconfig /flushdns”，按“Enter”键，提示刷新成功。
再次打开浏览器就可以访问GitHub网站了。