github忽然打不开，网络超时

能ping通baidu，ping不通git。
打开C:\Windows\System32\drivers\etc这个路径下的host文件

反正我就是用notepad打开的，大家自己找办法吧嘿嘿。

然后把下面代码

192.30.253.113    github.com

192.30.252.131 github.com

185.31.16.185 github.global.ssl.fastly.net

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

192.30.255.112  github.com git
185.31.16.184 github.global.ssl.fastly.net 
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

复制进去，保存。就可以啦！