用的是光盘安装且安装时未启用网络更新，结果没了光盘后就无法更新了。

一、编辑更新源文件

在终端中新建vi ~/sources.list，输入以下源选择一个自己喜欢的输入并保存

1、清华大学源

deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
deb https://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
deb-src https://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware

2、中科大源

deb https://mirrors.ustc.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb https://mirrors.ustc.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb https://mirrors.ustc.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
deb https://mirrors.ustc.edu.cn/debian-security/ bookworm-security main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian-security/ bookworm-security main contrib non-free non-free-firmware

3、腾讯源

deb https://mirrors.tencent.com/debian/ bookworm main non-free non-free-firmware contrib
deb-src https://mirrors.tencent.com/debian/ bookworm main non-free non-free-firmware contrib
deb https://mirrors.tencent.com/debian-security/ bookworm-security main
deb-src https://mirrors.tencent.com/debian-security/ bookworm-security main
deb https://mirrors.tencent.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb-src https://mirrors.tencent.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb https://mirrors.tencent.com/debian/ bookworm-backports main non-free non-free-firmware contrib
deb-src https://mirrors.tencent.com/debian/ bookworm-backports main non-free non-free-firmware contrib

4、阿里源

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

二、更新源

# 将~/sources.list复制并替换/etc/apt/sources.list
sudo cp ~/sources.list /etc/apt/sources.list

# 更新依赖
sudo apt-get upgrade