树莓派4B换源

备份

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

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

更改系统源文件

sudo vim /etc/apt/sources.list

把原有的注释掉，添加

deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ buster main contrib non-free rpi

deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ buster main contrib non-free rpi

更新软件列表和软件

sudo apt-get update

sudo apt-get upgrade

更改系统源

sudo vim /etc/apt/sources.list.d/raspi.list

同样注释掉原内容，添加上

deb http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui

deb-src http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui

刚更新到了最新版本