一台机器安装Debian时选择了CD-ROM作为更新源，apt-get 时提示如下错误：

Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
一、编辑文件
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vim /etc/apt/sources.list
二、加#注释掉CDROM 那行源
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cdrom://[Debian GNU/Linux 12.1.0 Bookworm - Official amd64 DVD

三、添加官方源
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deb http://deb.debian.org/debian/ bookworm main contrib non-free
deb http://deb.debian.org/debian/ bookworm-updates main contrib non-free
deb http://security.debian.org/debian-security bookworm-security main contrib non-free
四、更新即可
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apt-get update
apt-get dist-upgrade
apt-get upgrade