问题提出
在ArduinoIDE安装开发板开发包、库时经常由于这些包和库的索引指向的是github下面的开源项目，所以安装失败的可能性极高。开启了FastGithub后，更新成功率和速度都快了很多！
问题解决
使用FastGithub开源工具（支持Win,Mac,Linux）；FastGithub是一款基于DNS和HTTP代理的GitHub加速工具，可以加速GitHub的访问速度。
从这个地址下载https://github.com/dotnetcore/FastGithub
Windows下运行
解压后，运行FastGithub.UI.exe即可，如下图，一般不需要设置，用默认即可。
Linux下运行
# yum install lrzsz
# yum install libicu //一定要安装这个，否即FastGitHub运行提示缺少libicu，启动失败。
# cd ~
# rz
# unzip fastgithub_linux-x64.zip
# cd fastgithub_linux-x64
# ./fastgithub start //多种启动方式，我是以Service启动
# systemctl status fastgithub
● fastgithub.service - fastgithub
Loaded: loaded (/etc/systemd/system/fastgithub.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2023-05-15 17:50:25 CST; 17min ago
Main PID: 70755 (fastgithub)
Tasks: 25 (limit: 23157)
Memory: 71.5M
CPU: 4.141s
CGroup: /system.slice/fastgithub.service
├─70755 /root/fastgithub_linux-x64/fastgithub
└─70780 dnscrypt-proxy/dnscrypt-proxy
May 15 17:50:25 qzm-cloud-vm1 fastgithub[70755]: 已监听http://localhost:38457，http代理服务启动完成
May 15 17:50:25 qzm-cloud-vm1 fastgithub[70755]: 2023-05-15T17:50:25.3094712+08:00 [INF]
May 15 17:50:25 qzm-cloud-vm1 fastgithub[70755]: FastGithub.AppHostedService
May 15 17:50:25 qzm-cloud-vm1 fastgithub[70755]: FastGithub启动完成，当前版本为v2.1.4，访问 https://github.com/dotnetcore/fastgithub 关注新版本
May 15 17:50:25 qzm-cloud-vm1 systemd[1]: Started fastgithub.
May 15 17:50:25 qzm-cloud-vm1 systemd[1]: fastgithub.service: Got notification message from PID 70780, but reception only permitted for main PID 70755
May 15 17:50:26 qzm-cloud-vm1 fastgithub[70755]: 2023-05-15T17:50:26.3262631+08:00 [WRN]
May 15 17:50:26 qzm-cloud-vm1 fastgithub[70755]: FastGithub.AppHostedService
May 15 17:50:26 qzm-cloud-vm1 fastgithub[70755]: 请设置系统自动代理为http://127.0.0.1:38457，或手动代理http/https为127.0.0.1:38457
May 15 17:53:38 qzm-cloud-vm1 systemd[1]: fastgithub.service: Got notification message from PID 70780, but reception only permitted for main PID 70755