配置阿里云

ubuntu 20.04 设置国内镜像源（阿里源、清华源）_ubuntu 20.04 镜像源-CSDN博客

参考

sudo cp /etc/apt/sources.list /etc/apt/sources.list.back

vim /etc/apt/sources.list

sudo apt update

sudo apt upgrade
阿里云Ubuntu镜像：https://developer.aliyun.com/mirror/ubuntu