一、添加repo文件
$ vim /etc/yum.repos.d/MariaDB.repo
加入以下内容：
#MariaDB 5.5 CentOS repository list - created 2013-03-26 14:33 UTC
# http://mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/5.5/centos5-x86
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
保存退出
二、通过YUM来安装
$ sudo yum install MariaDB-server MariaDB-client
原文地址 https://kb.askmonty.org/en/installing-mariadb-with-yum/