mysql 忘记密码

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本文详细介绍了如何使用安全模式修改MySQL数据库密码和权限，包括停止服务、进入安全模式、修改密码、刷新权限等关键步骤，确保数据库安全性。

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[root@localhost ~]# mysql -uroot -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
[root@localhost ~]# service mysql stop
Shutting down MySQL.....                                   [  OK  ]
[root@localhost ~]# mysqld_safe --skip-grant-tables &
[1] 28846
[root@localhost ~]# 150604 20:46:13 mysqld_safe Logging to '/var/lib/mysql/localhost.localdomain.err'.
150604 20:46:13 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

[root@localhost ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.5.32 MySQL Community Server (GPL)

Copyright (c) 2000, 2013, 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> use mysql;
Database changed
mysql> update user set password=PASSWORD("aaa")where user="root";
Query OK, 0 rows affected (0.02 sec)
Rows matched: 1  Changed: 0  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.05 sec)

mysql> quit;
Bye
[root@localhost ~]# service mysql start;
Starting MySQL                                             [  OK  ]

主要操作包含：

停止服务-安全模式（不用输入密码直接回车）-修改mysql数据库密码-更新权限等操作。