Debian安装mysql提示签名错误

背景：在Debian平台安装mysql时，配置完软件包信息，执行 apt update 报错。

错误信息：

The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B7B3B788A8D3785C

解决：

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B7B3B788A8D3785C

参考：Signatures couldn’t be verified because public key not available