更新sources.list
如果是在 Dockerfile 中呢？
直接添加指令 ADD sources.list /etc/apt/。 然后把上面的源写成 sources.list文件，与 Dockerfile 放在 同一目录下。
备份一份源文件
mv /etc/apt/sources.list /etc/apt/sources.list.bak
修改文件
nano /etc/apt/sources.list
编辑添加下面的源，完成后，依次ctrl+O 、回车、ctrl+X即可，然后执行apt-get update更新数据库。
或者用
vim /etc/apt/sources.lis
华为云镜像
deb https://mirrors.huaweicloud.com/debian/ buster main non-free contrib deb-src https://mirrors.huaweicloud.com/debian/ buster main non-free contrib deb https://mirrors.huaweicloud.com/debian-security buster/updates main deb-src https://mirrors.huaweicloud.com/debian-security buster/updates main deb https://mirrors.huaweicloud.com/debian/ buster-updates main non-free contrib deb-src https://mirrors.huaweicloud.com/debian/ buster-updates main non-free contrib deb https://mirrors.huaweicloud.com/debian/ buster-backports main non-free contrib deb-src https://mirrors.huaweicloud.com/debian/ buster-backports main non-free contrib
阿里云镜像
deb http://mirrors.aliyun.com/debian/ buster main non-free contrib deb-src http://mirrors.aliyun.com/debian/ buster main non-free contrib deb http://mirrors.aliyun.com/debian-security buster/updates main deb-src http://mirrors.aliyun.com/debian-security buster/updates main deb http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib deb-src 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/ buster-backports main non-free contrib
163镜像
deb http://mirrors.163.com/debian/ buster main non-free contrib deb-src http://mirrors.163.com/debian/ buster main non-free contrib deb http://mirrors.163.com/debian-security buster/updates main deb-src http://mirrors.163.com/debian-security buster/updates main deb http://mirrors.163.com/debian/ buster-updates main non-free contrib deb-src http://mirrors.163.com/debian/ buster-updates main non-free contrib deb http://mirrors.163.com/debian/ buster-backports main non-free contrib deb-src http://mirrors.163.com/debian/ buster-backports main non-free contrib
清华镜像
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ buster main non-free contrib deb-src http://mirrors.tuna.tsinghua.edu.cn/debian/ buster main non-free contrib deb http://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main deb-src http://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main deb http://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main non-free contrib deb-src http://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main non-free contrib deb http://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main non-free contrib deb-src http://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main non-free contrib