前言

树莓派官方raspbian系统默认设置软件源为
http://raspbian.raspberrypi.org/raspbian/
和
http://archive.raspberrypi.org/debian/
，这两个网站在国内通常连接缓慢，影响使用体验。
如何更换国内源？
raspbian系统的apt软件源由 /etc/apt/sources.list 和 /etc/apt/sources.list.d/raspi.list 两个文件设定，只需更改两个文件内的记录即可。

国内支持raspbian的软件源

腾讯软件源

https://mirrors.cloud.tencent.com/raspbian/raspbian/
https://mirrors.cloud.tencent.com/raspberrypi/

清华大学开源软件镜像站TUNA

https://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/
https://mirrors.tuna.tsinghua.edu.cn/raspberrypi/

上海交通大学SJTUG软件源

https://mirrors.sjtug.sjtu.edu.cn/raspbian/raspbian/
https://mirrors.sjtug.sjtu.edu.cn/raspberrypi/debian/

中国科学技术大学开源软件镜像

https://mirrors.ustc.edu.cn/raspbian/raspbian/
https://mirrors.ustc.edu.cn/archive.raspberrypi.org/debian/

更换操作

为避免误更换为无效的源，先对配置文件在同目录进行备份：

sudo cp /etc/apt/sources.list /etc/apt/sources.list.save
sudo cp /etc/apt/sources.list.d/raspi.list /etc/apt/sources.list.d/raspi.list.save

如果需要还原

sudo cp /etc/apt/sources.list.save /etc/apt/sources.list
sudo cp /etc/apt/sources.list.d/raspi.list.save /etc/apt/sources.list.d/raspi.list

腾讯软件源

sudo sed -i "s?http://raspbian.raspberrypi.org/raspbian/?https://mirrors.cloud.tencent.com/raspbian/raspbian/?g" /etc/apt/sources.list
sudo sed -i "s?http://archive.raspberrypi.org/debian/?https://mirrors.cloud.tencent.com/raspberrypi/?g" /etc/apt/sources.list.d/raspi.list

清华大学开源软件镜像站TUNA

sudo sed -i "s?http://raspbian.raspberrypi.org/raspbian/?https://mirrors.ustc.edu.cn/raspbian/raspbian/?g" /etc/apt/sources.list
sudo sed -i "s?http://archive.raspberrypi.org/debian/?https://mirrors.ustc.edu.cn/archive.raspberrypi.org/debian/?g" /etc/apt/sources.list.d/raspi.list

修改完成后即可使用apt进行软件包升级

sudo apt update
sudo apt upgrade