With the release of CentOS 7 Mysql, the world’s most popular open source relational database management system is no longer available in the CentOS’s repositories and MariaDB has become the default database system. MariaDB is a backward compatible, binary drop-in replacement of MySQL. In this tutorial we will show you how to install MySQL on a CentOS 7 machine. If you want to install MariaDB instead of MySQL check our tutorial for installation instructions.