Debian 默認apt-get源為從cd介質安裝
⒈備份官方默認更新源文件
cp /etc/apt/sources.list /etc/apt/sources.list.bak 備份官方更新源文件
⒉編輯
1.打開
vi /etc/apt/sources.list
2.清空內容
ESC后進入命令模式輸入
:.,$d
也可以注釋以下內容
# deb cdrom:[Debian GNU/Linux 10.7.0 _Buster_ - Official amd64 DVD Binary-1 20201205-11:17]/ buster contrib main
3.復制以下內容（清華大學鏡像站）https://mirrors.tuna.tsinghua.edu.cn/help/debian/
# 默認注釋了源碼鏡像以提高 apt update 速度，如有需要可自行取消注釋 deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main contrib non-free
4.保存
ESC后進入命令模式輸入
:wq
⒊更新源
apt update