一、备份现有apt源配置mv /etc/apt/sources.list /etc/apt/sources.listback 二、替换为默认官方源1.Debian12替换为默认官方源全部复制后,直接粘贴然后一起执行。cat > /etc/apt/sources.list << EOF deb https://deb.debian.org/debian/ bookworm m...