Ubuntu　MariaDB 完全再インストール

sudo rm -r /etc/ld.so.conf.d/mysql /etc/mysql/my.cnf /usr/local/mysql /var/log/mysql/error.log
sudoapt purge mariadb-common mariadb-server
sudoapt autoremove
sudoapt clean
sudoapt installmariadb-common mariadb-server mariadb-client