有时候我们访问 Debian 的国外网站会比较慢，可以换为国内的源。
查看 Debian 全球镜像站 Debian -- Debian Mirrors (worldwide)，可以找到需要的国内的源网址：
| mirror.bjtu.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
| mirror.lzu.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
| mirror.nju.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
| mirrors.163.com |
/debian/ |
amd64 arm64 i386 mips64el ppc64el |
| mirrors.bfsu.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
| mirrors.hit.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
| mirrors.neusoft.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
| mirrors.tuna.tsinghua.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
| mirrors.ustc.edu.cn |
/debian/ |
amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x |
我们修改 /etc/apt/sources.list 文件，将 Debian 的默认源地址改成新的地址即可。
比如将 http://deb.debian.org 改成 https://mirrors.163.com，可使用以下这条命令：
sed -i 's#http://deb.debian.org#https://mirrors.163.com#g' /etc/apt/sources.list
sed -i 's#https://mirrors.163.com#http://mirrors.aliyun.com#g' /etc/apt/sources.list
注意，如果安装源是 https 协议的，我们还需要安装软件包 apt-transport-https。 执行 apt-get install apt-transport-https，随后再执行 apt-get update 即可。
apt-get install apt-transport-https
sudo apt-get update
sudo apt-get upgrade
也可以手工修改 /etc/apt/sources.list 文件，以 Debian 10 Buster 为例：
163镜像站
deb http://mirrors.163.com/debian/ buster main non-free contrib
deb http://mirrors.163.com/debian/ buster-updates main non-free contrib
deb http://mirrors.163.com/debian/ buster-backports main non-free contrib
deb http://mirrors.163.com/debian-security/ buster/updates main non-free contrib
deb-src http://mirrors.163.com/debian/ buster main non-free contrib
deb-src http://mirrors.163.com/debian/ buster-updates main non-free contrib
deb-src http://mirrors.163.com/debian/ buster-backports main non-free contrib
deb-src http://mirrors.163.com/debian-security/ buster/updates main non-free contrib
华为云镜像站
deb https://mirrors.huaweicloud.com/debian/ buster main contrib non-free
deb https://mirrors.huaweicloud.com/debian/ buster-updates main contrib non-free
deb https://mirrors.huaweicloud.com/debian/ buster-backports main contrib non-free
deb https://mirrors.huaweicloud.com/debian-security/ buster/updates main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ buster main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ buster-updates main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ buster-backports main contrib non-free
腾讯云镜像站
deb http://mirrors.cloud.tencent.com/debian/ buster main non-free contrib
deb http://mirrors.cloud.tencent.com/debian-security buster/updates main
deb http://mirrors.cloud.tencent.com/debian/ buster-updates main non-free contrib
deb http://mirrors.cloud.tencent.com/debian/ buster-backports main non-free contrib
deb-src http://mirrors.cloud.tencent.com/debian-security buster/updates main
deb-src http://mirrors.cloud.tencent.com/debian/ buster main non-free contrib
deb-src http://mirrors.cloud.tencent.com/debian/ buster-updates main non-free contrib
deb-src http://mirrors.cloud.tencent.com/debian/ buster-backports main non-free contrib
中科大镜像站
deb https://mirrors.ustc.edu.cn/debian/ buster main contrib non-free
deb https://mirrors.ustc.edu.cn/debian/ buster-updates main contrib non-free
deb https://mirrors.ustc.edu.cn/debian/ buster-backports main contrib non-free
deb https://mirrors.ustc.edu.cn/debian-security/ buster/updates main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ buster main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ buster-updates main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ buster-backports main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian-security/ buster/updates main contrib non-free
阿里云镜像站
deb http://mirrors.aliyun.com/debian/ buster main non-free contrib
deb http://mirrors.aliyun.com/debian-security buster/updates main
deb http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib
deb http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib
deb-src http://mirrors.aliyun.com/debian-security buster/updates main
deb-src http://mirrors.aliyun.com/debian/ buster main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib
清华大学镜像站
deb 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 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/ buster main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security/ buster/updates main contrib non-free
兰州大学镜像站
deb http://mirror.lzu.edu.cn/debian stable main contrib non-free
deb http://mirror.lzu.edu.cn/debian stable-updates main contrib non-free
deb http://mirror.lzu.edu.cn/debian/ buster-backports main contrib non-free
deb http://mirror.lzu.edu.cn/debian-security/ buster/updates main contrib non-free
deb-src http://mirror.lzu.edu.cn/debian stable main contrib non-free
deb-src http://mirror.lzu.edu.cn/debian stable-updates main contrib non-free
deb-src http://mirror.lzu.edu.cn/debian/ buster-backports main contrib non-free
deb-src http://mirror.lzu.edu.cn/debian-security/ buster/updates main contrib non-free
上海交大镜像站
deb https://mirror.sjtu.edu.cn/debian/ buster main contrib non-free
deb https://mirror.sjtu.edu.cn/debian/ buster-updates main contrib non-free
deb https://mirror.sjtu.edu.cn/debian/ buster-backports main contrib non-free
deb https://mirror.sjtu.edu.cn/debian-security/ buster/updates main contrib non-free
deb-src https://mirror.sjtu.edu.cn/debian/ buster-updates main contrib non-free
deb-src https://mirror.sjtu.edu.cn/debian/ buster-backports main contrib non-free
deb-src https://mirror.sjtu.edu.cn/debian/ buster main contrib non-free
deb-src https://mirror.sjtu.edu.cn/debian-security/ buster/updates main contrib non-free
老徐，2023/6/20