How to install MariaDB

sudo apt-get update

sudo apt-get install mariadb-client-10.1 mariadb-common mariadb-server-10.1 mariadb-server-core-10.1 mariadb-client-core-10.1

To remove mariadb and all files

sudo apt-get remove --purge mariadb-client-10.1 mariadb-common mariadb-server-10.1 mariadb-server-core-10.1 mariadb-client-core-10.1

sudo atp-get autoremove -y

sudo apt-get autoclean

sudo rm -rf /etc/mysql