1、关闭数据库
脚本：[root@mysql etc]# service mysql stop
2、使用脚本： mysqld_safe --skip-grant-tables 启动数据库
使用/usr/bin/mysqld_safe --skip-grant-tables&启动数据库
3、使用空密码进入数据库（mysql命令后直接回车）
[root@mysql ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.6.20-enterprise-commercial-advanced MySQL Enterprise Server - Advanced Edition (Commercial)
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>
4、使用UPDATE语句修改ROOT密码
mysql> UPDATE mysql.user SET
-> PASSWORD=PASSWORD('root')
-> where
-> User='root' AND Host='localhost';
5、关闭数据库并重新以正常方式启动数据库
[root@mysql ~]# service mysql restart;
Shutting down MySQL.. SUCCESS!
Starting MySQL.. SUCCESS!
[root@mysql ~]# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
[root@mysql ~]# mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.6.20-enterprise-commercial-advanced MySQL Enterprise Server - Advanced Edition (Commercial)
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>