这里是 admin 的密码丢失，id = 1，其他用户以此类推。
登陆mysql
# mysql
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| cacti |
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.02 sec)
MariaDB [(none)]> use cacti;
Database changed
MariaDB [cacti]> show tables;
MariaDB [cacti]>
MariaDB [cacti]> update user_auth set password=md5("admin") where id=‘1‘;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
原文：https://www.cnblogs.com/ytyzhn/p/12659565.html