現象：
公司內突然打不開GitHub上上的圖片了，其他同事的都可以，很奇怪
原因：
github界面的圖片打不開的原因是域名污染！ 為什么會出現域名污染，這是一個深刻但不方便這里解說的問題。
解決：
修改hosts
具體咋映射呢？修改hosts文件！！！本人使用的是Mac系統，所以使用Sublime
Text打開：/etc/hosts
在文件末尾添加：
#GitHub Start
140.82.113.3?? ? github.com
140.82.114.20?? 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
199.232.68.133?? avatars0.githubusercontent.com
199.232.28.133?? avatars1.githubusercontent.com
151.101.184.133?? avatars1.githubusercontent.com
151.101.184.133?? avatars2.githubusercontent.com
199.232.28.133?? avatars2.githubusercontent.com
151.101.184.133?? avatars3.githubusercontent.com
199.232.68.133?? avatars3.githubusercontent.com
151.101.184.133?? avatars4.githubusercontent.com
199.232.68.133?? avatars4.githubusercontent.com
151.101.184.133?? avatars5.githubusercontent.com
199.232.68.133?? avatars5.githubusercontent.com
151.101.184.133?? avatars6.githubusercontent.com
199.232.68.133?? avatars6.githubusercontent.com
151.101.184.133?? avatars7.githubusercontent.com
199.232.68.133?? avatars7.githubusercontent.com
151.101.184.133?? avatars8.githubusercontent.com
199.232.68.133?? avatars8.githubusercontent.com
#GitHub End
