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nano /etc/apt/sources.list
# 默认 Debian 11 Bullseye 的主要源
deb http://deb.debian.org/debian bullseye main contrib non-free
# 安全更新源
deb http://security.debian.org/debian-security bullseye-security main contrib non-free
# 更新源（可选，用于获取稳定版的后继更新）
deb http://deb.debian.org/debian bullseye-updates main contrib non-free
#官方源
deb http://deb.debian.org/debian/ oldoldstable main contrib non-free
deb-src http://deb.debian.org/debian/ oldoldstable main contrib non-free
deb http://deb.debian.org/debian/ oldoldstable main contrib non-free
deb-src http://deb.debian.org/debian/ oldoldstable main contrib non-free
deb http://deb.debian.org/debian/ oldoldstable main contrib non-free
deb-src http://deb.debian.org/debian/ oldoldstable main contrib non-free
deb http://deb.debian.org/debian-security/ oldoldstable/updates main contrib non-free
deb-src http://deb.debian.org/debian-security/ oldoldstable/updates main contrib non-free
#阿里
deb http://mirrors.aliyun.com/debian/ buster main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster main non-free contrib
deb http://mirrors.aliyun.com/debian-security buster/updates main
deb-src http://mirrors.aliyun.com/debian-security buster/updates main
deb http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib
deb http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib