更換國內(nèi)鏡像源--清華源(https://mirror.tuna.tsinghua.edu.cn/help/raspbian/)

sudo nano /etc/apt/sources.list

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

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

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

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