sudo vim /etc/apt/sources.list
注销原来的内容，新增如下内容
deb http://mirrors.aliyun.com/raspbian/raspbian/ buster main non-free contrib
deb-src http://mirrors.aliyun.com/raspbian/raspbian/ buster main non-free contrib
sudo vim /etc/apt/sources.list.d/raspi.list
注销原来的内容，新增如下内容
deb http://mirrors.aliyun.com/raspbian/raspbian/ buster main
deb-src http://mirrors.aliyun.com/raspbian/raspbian/ buster main
然后更新系统即可
sudo apt-get update && apt-get upgrade -y