#!/bin/bash

# 备份原始 sources.list 文件
cp /etc/apt/sources.list /etc/apt/sources.list.bak

# 覆盖写入新的 sources.list 内容
cat > /etc/apt/sources.list << EOF
deb https://mirrors.aliyun.com/debian/ bookworm main non-free non-free-firmware contrib
deb-src https://mirrors.aliyun.com/debian/ bookworm main non-free non-free-firmware contrib
deb https://mirrors.aliyun.com/debian-security/ bookworm-security main
deb-src https://mirrors.aliyun.com/debian-security/ bookworm-security main
deb https://mirrors.aliyun.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb-src https://mirrors.aliyun.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb https://mirrors.aliyun.com/debian/ bookworm-backports main non-free non-free-firmware contrib
deb-src https://mirrors.aliyun.com/debian/ bookworm-backports main non-free non-free-firmware contrib
EOF

# 输出提示信息
echo "sources.list 已更新，备份文件为 /etc/apt/sources.list.bak"