Desinstale o servidor e cliente Mariadb no Ubuntu 18.4
sudo systemctl stop mysql
sudo apt-get remove --purge mysql-server mysql-client mysql-common
Lonely Lapwing
sudo systemctl stop mysql
sudo apt-get remove --purge mysql-server mysql-client mysql-common
sudo apt-get autoclean
sudo rm -rf /var/lib/mysql/
sudo rm -rf /etc/mysql/
sudo apt-get autoremove