首先备份一下源文件：
cp /etc/apt/sources.list /etc/apt/sources.list.bak
然后修改一下源文件：
vi /etc/apt/sources.list
替换下面内容：
deb http://deb.debian.org/debian/ bookworm main
deb-src http://deb.debian.org/debian/ bookworm main
deb http://security.debian.org/debian-security bookworm-security main
deb-src http://security.debian.org/debian-security bookworm-security main
deb http://deb.debian.org/debian/ bookworm-updates main
deb-src http://deb.debian.org/debian/ bookworm-updates main
deb http://deb.debian.org/debian bookworm non-free non-free-firmware
deb-src http://deb.debian.org/debian bookworm non-free non-free-firmware
deb http://deb.debian.org/debian-security bookworm-security non-free non-free-firmware
deb-src http://deb.debian.org/debian-security bookworm-security non-free non-free-firmware
deb http://deb.debian.org/debian bookworm-updates non-free non-free-firmware
deb-src http://deb.debian.org/debian bookworm-updates non-free non-free-firmware
以上，Debian 团队创建了一个新的仓库 non-free-firmware 来打包非自由的软件包。因此，在上面最后三个部分中也包含了它们。
下面就可以升级系统了：
apt update -y
apt full-upgrade -y
更新完成后，重启一下系统：
reboot
