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Detects if the system is installed with MySQL:

Rpm-qa | grep MySQL

Unloading

RPM-E MySQL //  Normal Delete mode rpm-e--nodeps mysql //  Brute Force Delete mode, if you use the above command to delete, prompted to have other dependent files, then use this command can be Brute Force removal

Install MySQL

Yum install mysqlyum install MySQL-serveryum install MySQL-devel

Start MySQL:

Service mysqld Start

In the case of CentOS 7, because the MySQL database has been removed from the default program list, you can use MARIADB instead:

Yum install mariadb-server mariadb chown add mysql  /var/lib/mysqlsystemctl start mariadb  # Start Mariadbsystemctl stop mariadb  #停止MariaDBsystemctl restart mariadb  #重启MariaDBsystemctl enable mariadb  # Set boot up

After the MySQL installation is successful, the default root user password is empty and you can use the following command to create the root user's password:

mysqladmin-u root password "new_password";

You can connect to the MySQL server by using the following command:

Mysql-u root-p

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