How To Install MySQL 8 On CentOS Stream 9 (Step-by-Step Guide for Beginners)

Assuming you are using CentOS Stream 9 (or a similar RHEL 9-based system), here is step-by-step instructions how to install MySQL 8.

By default, CentOS ships with MariaDB (a MySQL-compatible fork), but you can install official MySQL 8.0 from Oracle's Yum repository.

1. Download the official MySQL Yum repository package :

sudo dnf install https://dev.mysql.com/get/mysql80-community-release-el9-1.noarch.rpm -y

2. Enable the MySQL 8.0 module and disable default MySQL modules :

sudo dnf module disable mysql -y
sudo dnf install mysql-community-server -y

3. Start and enable MySQL :

sudo systemctl start mysqld
sudo systemctl enable mysqld

4. Get the temporary MySQL root password :

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

5. Secure your MySQL installation :

sudo mysql_secure_installation

Use the temporary password.
Choose a strong new root password.
Follow prompts to remove anonymous users, disable remote root login, and remove test databases.

6. Log in to MySQL :

mysql -u root -p

7. Verify installation :

You can check the installed MySQL version :

mysql --version

Note on Firewalls (Optional)

If you're accessing MySQL remotely :

sudo firewall-cmd --permanent --add-service=mysql
sudo firewall-cmd --reload

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