操作系统：windows操作系统，xp或win7.
1.dos命令行窗口 进入mysql\bin ,停止mysql 服务
C:\Users\Administrator>cd C:\Program Files\MySQL\MySQL Server 5.5\bin
C:\Program Files\MySQL\MySQL Server 5.5\bin>net stop mysql MySQL 服务正在停止. MySQL 服务已成功停止。
2. 以不检查权限的方式启动mysql C:\Program Files\MySQL\MySQL Server 5.5\bin>mysqld --skip-grant-tables 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。
3. 新建一个命令行窗口同样进入到e:\mysql5.5\bin目录，启动mysql
C:\Program Files\MySQL\MySQL Server 5.5\bin>mysql
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.5.43 MySQL Community Server (GPL) Copyright (c) 2000, 2015, 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 |
+--------------------+
3 rows in set (0.00 sec)
mysql> use mysql; Database changed
4. 修改root密码
mysql> update user set password=1 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
5. 任务管理器里关mysql进程
C:\Program Files\MySQL\MySQL Server 5.5\bin>net start mysql
MySQL 服务正在启动 . MySQL 服务已经启动成功。
6. 重启mysql，就可以用你设置新密码登陆
C:\Program Files\MySQL\MySQL Server 5.5\bin>mysql -u root -p 1
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.5.43 MySQL Community Server (GPL) Copyright (c) 2000, 2015, 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.
