查看默认镜像源
cat /etc/apt/sources.list
备份默认镜像源
mv /etc/apt/sources.list /etc/apt/sources.list.bak
配置国内debian镜像源
cat >> /etc/apt/sources.list <<EOF
deb http://mirrors.163.com/debian/ buster main non-free contrib
deb http://mirrors.163.com/debian/ buster-updates main non-free contrib
deb http://mirrors.163.com/debian/ buster-backports main non-free contrib
deb http://mirrors.163.com/debian-security/ buster/updates main non-free contrib
deb-src http://mirrors.163.com/debian/ buster main non-free contrib
deb-src http://mirrors.163.com/debian/ buster-updates main non-free contrib
deb-src http://mirrors.163.com/debian/ buster-backports main non-free contrib
deb-src http://mirrors.163.com/debian-security/ buster/updates main non-free contrib
EOF
更新
apt-get update
其他国内镜像源可以查看https://cloud.tencent.com/developer/article/1590080