root 用户无法免密登陆，同时又忘记了密码? ``` BASH /usr/local/mariadb/bin/mysqladmin -u有权限的用户名 -p密码 shutdown /usr/local/mariadb/bin/mysqld_safe --skip-grant-tables & mysql -A -e "update mysql.user set password=password('root') where user='root'"; mysql -A -e "flush privileges;" /usr/local/mariadb/bin/mysqladmin shutdown mkdir -p /var/run/mariadb; chown -R mysql:mysql /var/run/mariadb; /usr/local/mariadb/bin/mysqld_safe --datadir=/data/mariadb/data --pid-file=/var/run/mariadb/mariadb.pid > /dev/null 2>&1 & ```