Install and configure MariaDB.

This is a fairly easy objective:

Run the following command to install MariaDB:

sudo yum -y install mariadb mariadb-server

 To start and enable it so that it starts again post reboot:

systemctl start mariadb.service
systemctl enable mariadb.service

Finally, run this script (and follow the steps therein) to finalize the installation:

mysql_secure_installation 

I'm not entirely, if anything else is required by this objective to be honest and I'm a bit rusty with Linux, which is why I started with something easy.