cat << EOF > /etc/yum.repos.d/mariadb.repo
[mariadb]
name = MariaDB-10.4
baseurl=http://yum.mariadb.org/10.4/centos8-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
EOF

rpm –import https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
dnf update
dnf –disablerepo=AppStream install MariaDB-server MariaDB-client