泰山派更换软件源

1、编辑apt软件包源获取文件

vim /etc/apt/sources.list

2、更换为下面的源

deb http://mirrors.ustc.edu.cn/ubuntu-ports/ focal main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-backports main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-proposed main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-security main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-updates main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ focal main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-backports main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-proposed main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-security main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ focal-updates main multiverse restricted universe

3、更新源

 sudo apt update

4、测试下载

apt-get install git