1. 编辑 /etc/apt/sources.list 文件

sudo nano /etc/apt/sources.list

2. 清空 sources.list 文件里的内容，讲下面内容拷贝到 sources.list

deb http://mirrors.163.com/debian/ bookworm main contrib non-free non-free-firmware
deb http://mirrors.163.com/debian/ bookworm-updates main contrib non-free non-free-firmware
deb http://mirrors.163.com/debian/ bookworm-backports main contrib non-free non-free-firmware
deb http://mirrors.163.com/debian-security/ bookworm-security main contrib non-free non-free-firmware

3. 保存并关闭文件，然后更新包列表：

sudo apt update