2023年11月更新：
cp -r /etc/apt/sources.list /etc/apt/sources.list.bak;echo -e "deb http://deb.debian.org/debian buster main\ndeb-src http://deb.debian.org/debian buster main\ndeb http://security.debian.org/debian-security buster/updates main\ndeb-src http://security.debian.org/debian-security buster/updates main" > /etc/apt/sources.list;cat /etc/apt/sources.list;apt-get update;
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Debian10更新源经常出问题，一键切换回官方源
cp -r /etc/apt/sources.list /etc/apt/sources.list.bak;echo -e "deb http://deb.debian.org/debian/ buster main contrib non-free\ndeb-src http://deb.debian.org/debian/ buster main contrib non-free\ndeb http://deb.debian.org/debian/ buster-updates main contrib non-free\ndeb-src http://deb.debian.org/debian/ buster-updates main contrib non-free\ndeb http://deb.debian.org/debian/ buster-backports main contrib non-free\ndeb-src http://deb.debian.org/debian/ buster-backports main contrib non-free\ndeb http://deb.debian.org/debian-security/ buster/updates main contrib non-free\ndeb-src http://deb.debian.org/debian-security/ buster/updates main contrib non-free" > /etc/apt/sources.list;cat /etc/apt/sources.list;apt-get update;
如果出现 Repository 'http://security.debian.org/debian-security buster/updates InRelease' changed its 'Suite' value from 'stable' to 'oldstable'等类似的提示，输入以下命令解决
sudo apt-get --allow-releaseinfo-change update
如果出现 `GPG error: http://deb.debian.org/debian buster-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0E98404D386FA1D9 NO_PUBKEY 6ED0E7B82643E131
E: The repository 'http://deb.debian.org/debian buster-backports InRelease' is not signed.`等类似提示，说明仓库没有签名，缺PUBKEY，按以下方法解决
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys <PUB_KEY1> <PUB_KEY2>……比如上面那个就可以这样：sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0E98404D386FA1D9 6ED0E7B82643E131
如果出现E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation 那你还需要先装个gnupg：apt-get install gnupg -y，然后再按上面的解决方案就行了，最后记得更新一下系统看看：apt-get update
