Mysql实例MySql5.5忘记root密码怎么办

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本文介绍了Mysql实例MySql5.5忘记root密码怎么办，希望对您有用。如果有疑问，可以联系我们。

使用mysql5.5,突然root密码忘记,怎么也登录不了,很急人,该怎么解决呢?下面通过本文给大家介绍mysql5.5忘记root密码的解决办法,需要的朋友参考下吧MYSQL入门

方法一：MYSQL入门

操作系统：windows操作系统,xp或win7.
MYSQL入门

C:UsersAdministrator>cd C:Program FilesMySQLMySQL Server 5.5bin
C:Program FilesMySQLMySQL Server 5.5bin>net stop mysql
MYSQL入门

MySQL 服务正在停止.
MYSQL入门

MySQL 服务已成功停止.MYSQL入门

C:Program FilesMySQLMySQL Server 5.5bin>mysqld --skip-grant-tables
MYSQL入门

你会看到窗口光标在下一行的第一个位置闪烁,这说明已经启动了,不需要管.MYSQL入门

新建一个命令行窗口同样进入到e:mysql5.5bin目录,启动mysql
MYSQL入门

C:Program FilesMySQLMySQL Server 5.5bin>mysql
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.5.36 MySQL Community Server (GPL)
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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
mysql> use mysql;
Database changed
mysql> update user set password=PASSWORD('oracle') where user='root';
Query OK,2 rows affected (0.00 sec)
Rows matched: 2 Changed: 2 Warnings: 0
mysql> flush privileges;
Query OK,0 rows affected (0.01 sec)
mysql> quit
Bye

看看那任务管理器中是否有mysqld.exe进程,如有,kill .
MYSQL入门

MYSQL入门

C:Program FilesMySQLMySQL Server 5.5bin>net start mysql
MYSQL入门

MySQL 服务正在启动 .
MYSQL入门

MySQL 服务已经启动成功.
MYSQL入门

C:Program FilesMySQLMySQL Server 5.5bin>mysql -uroot -poracle
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.5.36 MySQL Community Server (GPL)
Copyright (c) 2000,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>

方法二：MYSQL入门

操作系统：windows操作系统,xp或win7.MYSQL入门

　　1.dos命令行窗口 进入e:mysql5.5bin,停止mysql 服务MYSQL入门

　　e:mysql5.5bin>net stop mysqlMYSQL入门

　　注意:看看那任务管理器中是否有mysqld.exe进程,kill them all.MYSQL入门

　　2. 以不检查权限的方式启动mysqlMYSQL入门

　　e:mysql5.5bin>mysqld.exe --skip-grant-tablesMYSQL入门

　　你会看到窗口光标在下一行的第一个位置闪烁,不需要管.MYSQL入门

　　3. 新建一个命令行窗口同样进入到e:mysql5.5bin目录,启动mysqlMYSQL入门

　　e:mysql5.5bin>mysqlMYSQL入门

　　4. 修改root密码MYSQL入门

mysql>use mysql
　　mysql>update user set password=PASSWORD('new_password') where user='root';
　　mysql>flush privileges;
　　mysql>quit

　　5. 看看那任务管理器中是否有mysqld.exe进程,kill them all.MYSQL入门

　　6. 重启mysql,就可以用你设置新密码登陆MYSQL入门

e:mysql5.5bin>net start mysql
　　e:mysql5.5bin>mysql -u root -pnew_password 
　　that's all .

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