In Linux, MySQL5.6.15-forget the root password-Reset

Mysql5.6.15 forget the root password of the database:

[Root @ oraserver139 ~] # Mysql-uroot-p
Enter password:
ERROR 1045 (28000): Access denied for user 'root' @ 'localhost' (using password: NO)

View the currently installed mysql version:
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


Stop mysql service:
[Root @ oraserver139 ~] # Service mysql stop
Shutting down MySQL... SUCCESS!

Go to the skip-grant-tables mode:

[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


Now you can access mysql without a password:

[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) 2000,201 3, 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.

Go to the mysql System database:
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-
Database changed

Modify the root account password:
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


Refresh permission:
Mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

Mysql> exit
Bye


Stop the mysql process:

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

Start mysql:

[Root @ oraserver139 ~] # Service mysql start
Starting MySQL SUCCESS!


Use the password you just modified to access 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) 2000,201 3, 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 ('20140901 ');
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)

Modification completed;