mysql5.6忘记数据库的root密码,重置密码

mysql5.6忘记数据库的root密码：

[root@oraserver139 ~]# mysql -uroot -p

Enter password:

ERROR 1045 (28000): Access
denied for user 'root'@'localhost' (using password: NO)

查看当前安装的mysql版本：

root@oraserver139 ~]# rpm -qa | grep MySQL

MySQL-server-5.6.15-1.el6.x86_64

MySQL-client-5.6.15-1.el6.x86_64

MySQL-shared-compat-5.6.15-1.el6.x86_64

MySQL-devel-5.6.15-1.el6.x86_64

perl-DBD-MySQL-4.022-1.el6.rfx.x86_64

停止mysql服务：

[root@oraserver139 ~]# service mysql stop

Shutting down MySQL.. SUCCESS!

进入到skip-grant-tables模式：

[root@oraserver139 ~]# mysqld_safe
--skip-grant-tables

140211 15:37:49 mysqld_safe Logging to '/var/lib/mysql/oraserver139.err'.

140211 15:37:49 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

现在就不需要密码就可以进入mysql了：

[root@oraserver139 ~]# mysql

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 1

Server version: 5.6.15 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.

进入mysql系统数据库：

mysql> use
mysql

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

修改root账户密码：

mysql> update
user set password=password("12345") where user="root";

Query OK, 4 rows affected (0.02 sec)

Rows matched: 4 Changed: 4 Warnings: 0

刷新权限：

mysql> flush
privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> exit

Bye

停止mysql进程：

[1]+ Stopped mysqld_safe --skip-grant-tables

启动mysql：

[root@oraserver139 ~]# service
mysql start

Starting MySQL SUCCESS!

使用刚才修改的密码进入mysql：

[root@oraserver139 ~]# mysql
-uroot -p12345

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 3

Server version: 5.6.15

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> show databases;

ERROR 1820 (HY000): You must SET PASSWORD before executing this statement

mysql> SET
PASSWORD = PASSWORD('12345');

Query OK, 0 rows affected (0.00 sec)

mysql> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema |

| mysql |

| performance_schema |

| test |

+--------------------+

4 rows in set (0.00 sec)

修改完成；