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A test library created temporarily, forgetting the root password, can be solved by the following methods:

1. Add skip-grant-tables=1 under [mysqld] by editing / etc/my.cnf file to save and exit

[mysqld] skip-grant-tables=1

2. Restart the MySql service

[root@iZ2ze7qh7q0di3qkvef1dzZ etc] # systemctl stop mysqld.service [root@iZ2ze7qh7q0di3qkvef1dzZ etc] # systemctl start mysqld.service

Log in to mysql as root

[root@iZ2ze7qh7q0di3qkvef1dzZ etc] # mysql-u rootWelcome to the MySQL monitor. Commands end with; or\ g.Your MySQL connection id is 2Server version: 5.7.24 MySQL Community Server (GPL) Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or'\ h' for help. Type'\ c'to clear the current input statement.

4. Access the mysql database

Mysql > use mysqlReading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with-ADatabase changed

5. Modify the root password:

Mysql > update user set authentication_string = password ('HecomDB2015roommates'), password_last_changed=now () where user='root';Query OK, 2 rows affected, 1 warning (0.00 sec) Rows matched: 2 Changed: 2 Warnings: 1

6. Exit mysql, edit the / etc/my.cnf file again, delete the skip-grant-tables=1 added in the first step, and restart the MySql service.

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