APT仓库
适用于focal（Ubuntu20.04）的系统软件源
编辑配置文件
sudo vim /etc/apt/sources.list
配置文件覆盖内容
deb http://mirror.xiyoucloud.pro:63333/repository/ubuntu-focal/ focal main restricted universe multiverse
deb http://mirror.xiyoucloud.pro:63333/repository/ubuntu-focal/ focal-updates main restricted universe multiverse
deb http://mirror.xiyoucloud.pro:63333/repository/ubuntu-focal/ focal-backports main restricted universe multiverse
deb http://mirror.xiyoucloud.pro:63333/repository/ubuntu-focal/ focal-security main restricted universe multiverse
更新软件源
sudo apt update