Armbian 更换国内源

1、先查看系统版本

root@nanopik2-s905:~# lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal

2、修改源

#先备份原先的源

root@nanopik2-s905:~# cp /etc/apt/sources.list /etc/apt/sources.list-bak

root@nanopik2-s905:~# vim  /etc/apt/sources.list

#把列表里面的deb开头用#注释掉，然后再添加进去以下的国内源

#到目前2020/11/24 还是可用的

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

更新：
root@nanopik2-s905:~# apt-get update
root@nanopik2-s905:~# apt-get upgrade