Windows 系统：C:WindowsSystem32driversetchosts
Linux 系统：/etc/hosts
Mac（苹果电脑）系统：/etc/hosts
Android（安卓）系统：/system/etc/hosts
iPhone（iOS）系统：/etc/hosts
修改方法，把第一步的内容复制到文本末尾：
Windows 使用记事本。
Linux、Mac 使用 Root 权限：sudo vi /etc/hosts。
iPhone、iPad 须越狱、Android 必须要 root。
185.199.108.154 github.githubassets.com 185.199.108.154 github-releases.githubusercontent.com 140.82.113.22 central.github.com 185.199.108.133 desktop.githubusercontent.com 185.199.108.153 assets-cdn.github.com 185.199.108.133 camo.githubusercontent.com 185.199.108.133 github.map.fastly.net 199.232.69.194 github.global.ssl.fastly.net 140.82.114.3 gist.github.com 185.199.108.153 github.io 140.82.114.3 github.com 140.82.113.6 api.github.com 185.199.108.133 raw.githubusercontent.com 185.199.108.133 user-images.githubusercontent.com 185.199.108.133 favicons.githubusercontent.com 185.199.108.133 avatars5.githubusercontent.com 185.199.108.133 avatars4.githubusercontent.com 185.199.108.133 avatars3.githubusercontent.com 185.199.108.133 avatars2.githubusercontent.com 185.199.108.133 avatars1.githubusercontent.com 185.199.108.133 avatars0.githubusercontent.com 185.199.108.133 avatars.githubusercontent.com 140.82.114.10 codeload.github.com 52.217.101.252 github-cloud.s3.amazonaws.com 52.216.238.99 github-com.s3.amazonaws.com 52.216.129.211 github-production-release-asset-2e65be.s3.amazonaws.com 52.217.101.68 github-production-user-asset-6210df.s3.amazonaws.com 52.217.48.84 github-production-repository-file-5c1aeb.s3.amazonaws.com 185.199.108.153 githubstatus.com 64.71.168.201 github.community 185.199.108.133 media.githubusercontent.com
2.1.2 激活生效
大部分情况下是直接生效，如未生效可尝试下面的办法，刷新 DNS：
Windows：在 CMD 窗口输入：ipconfig /flushdns
Linux 命令：sudo rcnscd restart
Mac 命令：sudo killall -HUP mDNSResponder
另一种：
访问 ：https://fastly.net.ipaddress.com/github.global.ssl.fastly.net#ipinfo
把hosts文件修改或新增
199.232.69.194 github.global.ssl.fastly.net
然后再刷新激活