今天使用 apt update 的时候 出现了下面的错误

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.mysql.com/apt/debian stretch InRelease: The following signatures were invalid: EXPKEYSIG 8C718D3B5072E1F5 MySQL Release Engineering <mysql-build@oss.oracle.com>
W: Failed to fetch http://repo.mysql.com/apt/debian/dists/stretch/InRelease  The following signatures were invalid: EXPKEYSIG 8C718D3B5072E1F5 MySQL Release Engineering <mysql-build@oss.oracle.com>
W: Some index files failed to download. They have been ignored, or old ones used instead.

因为mysql 密钥过期了

解决办法

重新下载 MySQL APT Repository 安装

然后再次运行 apt update 就可以了