Debian9更新软件提示NO_PUBKEY

1.debian9更换debian10镜像源更新提示gpg证书错误

W: GPG error: http://mirrors.tuna.tsinghua.edu.cn/debian buster-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0E98404D386FA1D9 NO_PUBKEY 6ED0E7B82643E131

2.安装需要的依赖和软件

apt-get install software-properties-common dirmngr -y

弹窗回车即可

3.添加gpg证书验证

apt-key adv --keyserver keyserver.ubuntu.com --recv-keys apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0E98404D386FA1D9 6ED0E7B82643E131