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mysql的root账号忘记密码了怎么办？经过志文工作室的验证，windows下使用以下步骤即可重置密码，linux下亦可参考相关命令方法解决
Windows下的实际操作如下
1.关闭正在运行的MySQL。
2.打开DOS窗口，转到mysqlbin目录。
3.输入mysqld –skip-grant-tables回车。如果没有出现提示信息，那就对了。
4.再开一个DOS窗口(因为刚才那个DOS窗口已经不能动了)，转到mysqlbin目录。
5.输入mysql回车，如果成功，将出现MySQL提示符 >
6. 连接权限数据库：use mysql
7.改密码：update user set password=password("123456") where user="root"
8.刷新权限(必须的步骤)>flush privileges
9.退出 > q
10.重启mysql服务，或直接重启系统打开MySQL，使用用户名root和刚才设置的新密码123456登陆
操作过程参考
第一步
C:Documents and SettingsAdministrator>cd D:webwww.php100.comMysqlMySQL Server5.5bin
C:Documents and SettingsAdministrator>d:
D:webwww.php100.comMysqlMySQL Server5.5bin>mysqld --skip-grant-tables第二步
C:Documents and SettingsAdministrator>cd D:webwww.php100.comMysqlMySQL Server5.5bin
C:Documents and SettingsAdministrator>d:
D:webwww.php100.comMysqlMySQL Server5.5bin>mysql
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.5.10 MySQL Community Server (GPL)
Copyright (c) 2000, 2010, 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("520") where user="root";
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> q
Bye
D:webwww.php100.comMysqlMySQL Server5.5bin>
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