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
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