centos mysql安裝報錯：The GPG keys listed for the "MySQL 8.0 Community Server" repository are already installed but they are not correct for this package.

場景：

　　安裝mysql8的時候，之前沒遇到這個問題，這次突然遇到新的問題（可能是之前裝了mysql5.7？）：The GPG keys listed for the "MySQL 8.0 Community Server" repository are already installed but they are not correct for this package.

解決：

　　1.可以先嘗試這個：

　　　　sudo rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY*

　　然后在yum install mysql-community-server

　　2.不行的話，可以用這個：

　　　　sudo yum -y install * --nogpgcheck

　　GPG keys是安裝包發布時生成的密鑰，安裝是需要核對密鑰來確保安全性

參考：

　　https://www.cnblogs.com/gaohongyu/p/14479497.html