In /etc/yum.repos.d deca exista MariaDB.repo pui / sau schimbi versiunea. Daca nu ai repo il touch && edit.
[mariadb]
name = MariaDB
baseurl =
http://yum.mariadb.org/10.3/centos7-amd64gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
yum clean all && yum update
yum install mariadb
poti verifica no versiunii inainte de press "y"