打開終端，并使用以下命令添加 MySQL 5.7 的軟件源

sudo dnf install https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

下載 MySQL 公鑰文件

sudo rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql

確認(rèn)公鑰已正確導(dǎo)入

sudo rpm -qa gpg-pubkey*

安裝 MySQL 5.7

sudo dnf install mysql-community-server -y

如果您仍然遇到 GPG 檢查失敗的錯誤至非，在運(yùn)行安裝命令時(shí)篷朵，可以使用 --nogpgcheck 選項(xiàng)禁用 GPG 檢查勾怒。例如：

sudo dnf install mysql-community-server --nogpgcheck -y

完成安裝后婆排，啟動 MySQL 服務(wù)

sudo  systemctl enable mysqld
sudo systemctl start mysqld

使用以下命令查看 MySQL 服務(wù)狀態(tài)，確保它正在運(yùn)行

sudo systemctl status mysqld

查看root密碼

sudo grep 'temporary password' /var/log/mysqld.log

運(yùn)行以下命令來保護(hù)您的 MySQL 安裝 sudo mysql_secure_installation

[root@localhost ~]# sudo mysql_secure_installation
Securing the MySQL server deployment.
Enter password for user root: 　　//輸入root密碼
The 'validate_password' plugin is installed on the server.
The subsequent steps will run with the existing configuration of the plugin.
Using existing password for root.
Estimated strength of the password: 25
Change the password for root ? ((Press y|Y for Yes, any other key for No) : No　　//是否更改root密碼笔链，如果輸入y會要求設(shè)置新的密碼
 ... skipping.
By default, a MySQL installation has an anonymous user,allowing anyone to log into MySQL without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment.
Remove anonymous users? (Press y|Y for Yes, any other key for No) : y　　//是否刪除匿名用戶段只，建議y刪除
Success.
Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y　　//是否禁止root遠(yuǎn)程登錄，建議y禁止
Success.
By default, MySQL comes with a database named 'test' that anyone can access. This is also intended only for testing, and should be removed before moving into a production environment.
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y　　//是否刪除test數(shù)據(jù)庫卡乾，y刪除
 - Dropping test database...
Success.
 - Removing privileges on test database...
Success.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y　　//是否重新加載權(quán)限表翼悴，y重新加載
Success.
All done!

• 其他配置可參考：
  CentOS 7 MariaDB安裝、卸載幔妨、數(shù)據(jù)目錄更改為新位置