title: Completely remove MariaDB or MySQL from CentOS 7 or RHEL 7
body: <p>I installed MariaDB on CentOS 7 but I had some problems with some configuration, now it is completely misconfigured. </p>
  
  <p>Thus, I wanted to remove the MariaDB with “yum remove mariadb mariadb-server”, after that I reinstalled it with “yum install mariadb mariadb-server”.</p>
  
  <p>Unfortunately, the configuration remains. It seems as if yum remove don’t delete all MariaDB Config-Files.</p>
  
  <p>How can I remove MariaDB completely from CentOS 7?</p>