第一个文件 -> sources.list
sudo nano /etc/apt/sources.list
用#注释掉原来的、删掉也行，换成下面的
#将原有内容用#注释掉deb /raspbian/raspbian/ buster main contrib non-free rpideb-src /raspbian/raspbian/ buster main contrib non-free rpi
第二个文件 -> sources.list.d/raspi.list
sudo nano /etc/apt/sources.list.d/raspi.list
用#注释掉原来的、删掉也行，换成下面的
#将原有内容用#注释掉deb /raspbian/raspbian/ buster maindeb-src /raspbian/raspbian/ buster main
更新镜像源
sudo apt-get updatesudo apt-get upgrade
