Linux系统下载
https://www.linux.org/pages/download/
CentOS 8 下载
Centos 7.7(1908) 下载
Ubuntu下载：https://www.ubuntu.com/download
Debian 下载 https://www.debian.org/distrib/ftplist
https://www.raspberrypi.org/downloads/
https://cdimage.debian.org/debian-cd/current/amd64/bt-dvd/
https://www.archlinux.org/download/
