One of the most common databases is MySQL and the best medium for this database type is Linux. To setup this database, you should follow the following steps in order to install it easily and securely.
These steps contains:
1. Installing MySQL server daemon
2. Installing MySQL module for PHP
3. Starting MySQL daemon
4. Follow security wizard
5. Set MySQL daemon to run at boot
These 5 steps are the most basic things you should do before using your server for business.