1、win10系统中：
修改hosts文件-解析dns。文件位置：
<pre style="margin: 0px; padding: 0px; overflow: auto; overflow-wrap: break-word; font-family: "Courier New" !important; font-size: 12px !important; white-space: pre;">C:\Windows\System32\drivers\etc</pre>
可以用文本打开，添加dns解析：（复制到hosts最后即可）
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<pre style="margin: 0px; padding: 0px; overflow: auto; overflow-wrap: break-word; font-family: "Courier New" !important; font-size: 12px !important; white-space: pre;">192.30.253.112 github.com
192.30.253.119 gist.github.com
151.101.100.133 assets-cdn.github.com
151.101.100.133 raw.githubusercontent.com
151.101.100.133 gist.githubusercontent.com
151.101.100.133 cloud.githubusercontent.com
151.101.100.133 camo.githubusercontent.com
151.101.100.133 avatars0.githubusercontent.com
151.101.100.133 avatars1.githubusercontent.com
151.101.100.133 avatars2.githubusercontent.com
151.101.100.133 avatars3.githubusercontent.com
151.101.100.133 avatars4.githubusercontent.com
151.101.100.133 avatars5.githubusercontent.com
151.101.100.133 avatars6.githubusercontent.com
151.101.100.133 avatars7.githubusercontent.com
151.101.100.133 avatars8.githubusercontent.com</pre>
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2、ubuntu系统中：
修改hosts文件，文件位置：(用vim打开在最后添加同上的dns解析)
<pre style="margin: 0px; padding: 0px; overflow: auto; overflow-wrap: break-word; font-family: "Courier New" !important; font-size: 12px !important; white-space: pre;">sudo vim /etc/hosts</pre>
3、win10更新dns：
<pre style="margin: 0px; padding: 0px; overflow: auto; overflow-wrap: break-word; font-family: "Courier New" !important; font-size: 12px !important; white-space: pre;">ipconfig /flushdns</pre>
4、ubuntu更新dns：
<pre style="margin: 0px; padding: 0px; overflow: auto; overflow-wrap: break-word; font-family: "Courier New" !important; font-size: 12px !important; white-space: pre;">sudo /etc/init.d/dns-clean start</pre>
补充：更新完后重启浏览器。
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dns解析服务器IP的获得:
在dns解析网址中输入要解析的域名，点击检索，找TTL值最小的IP，添加进hosts，做为域名解析。
