年后因为疫情原因两三个月没碰公司的电脑，来了换台电脑升级配置和Xcode 为最新版本，发现遇到raw.githubusercontent.com无法连接问题，然后查询解决方案 特次记录保存下
修改hosts Ubuntu，CentOS及macOS直接在终端输入
sudo vi /etc/hosts
添加以下内容保存即可 （IP地址查询后相应修改，可以ping不同IP的延时 选择最佳IP地址）
# GitHub Start
52.74.223.119 github.com
192.30.253.119 gist.github.com
54.169.195.247 api.github.com
185.199.111.153 assets-cdn.github.com
151.101.76.133 raw.githubusercontent.com
151.101.108.133 user-images.githubusercontent.com
151.101.76.133 gist.githubusercontent.com
151.101.76.133 cloud.githubusercontent.com
151.101.76.133 camo.githubusercontent.com
151.101.76.133 avatars0.githubusercontent.com
151.101.76.133 avatars1.githubusercontent.com
151.101.76.133 avatars2.githubusercontent.com
151.101.76.133 avatars3.githubusercontent.com
151.101.76.133 avatars4.githubusercontent.com
151.101.76.133 avatars5.githubusercontent.com
151.101.76.133 avatars6.githubusercontent.com
151.101.76.133 avatars7.githubusercontent.com
151.101.76.133 avatars8.githubusercontent.com
# GitHub End
出现原因是本地Hosts没有链接