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

sudo apt purge mariadb-common mariadb-server

sudo apt autoremove

sudo apt clean

sudo apt install mariadb-common mariadb-server mariadb-client

sudo systemctl status mysql