Below are the steps.
1. Create repo file for MariaDB 10.3 as below.
# nano /etc/yum.repos.d/mariadb.repo
[mariadb] name=MariaDB baseurl=http://yum.mariadb.org/10.3/centos7-amd64 enabled=1 gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB gpgcheck=1
Save this file and run
# yum update -y
2. Install MariaDB 10.3 as below.
# yum install MariaDB-server MariaDB-client -y
3. Enable to start this service at boot time.
# systemctl enable mariadb.service
4. Start the service.
# systemctl start mariadb.service
5. Check activity on Port 3306 (Default MySQL Port.)
# lsof -i :3306
6. Now Login to MariaDB using MySQL Client as below.
# mysql -h localhost -u root -p
Default password is Nil (No Password.)
Change the administrator password.