# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb http://mirrors4.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
# deb-src http://mirrors4.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb http://mirrors4.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
# deb-src http://mirrors4.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb http://mirrors4.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
# deb-src http://mirrors4.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
# 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换
deb http://mirrors4.tuna.tsinghua.edu.cn/debian-security bookworm-security main contrib non-free non-free-firmware
# deb-src http://mirrors4.tuna.tsinghua.edu.cn/debian-security bookworm-security main contrib non-free non-free-firmware