Reset mysql root password

Note mysql running process. Copy mysqld_safe executed process 

ps ax | grep mysql

Stop running mysql process.

/etc/init.d/mysql stop

Append skip-grant-tables at the end of the mysqld_safe process and execute mysqld_safe manually with command below.

/usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/oel1.localdomain.pid --skip-grant-tables

On next terminal window, login to mysql as user root without password.

[root@oel1 ~]# mysql -u root

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

Your MySQL connection id is 1

Server version: 5.6.10-enterprise-commercial-advanced MySQL Enterprise Server - Advanced Edition (Commercial)

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> 

Reset mysql password with command below. 

mysql>  update mysql.user set password=PASSWORD('P@ssw0rd5308')

    -> where user='root';

Query OK, 4 rows affected (0.01 sec)

Rows matched: 4  Changed: 4  Warnings: 0

mysql> 

Reload privileges with Flush privilege command.

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

Kill the existing running mysql process.

[root@oel1 ~]# ps ax | grep mysql | grep -v grep | awk '{print $1}' | xargs kill

Start mysql process now you can login with new password

/etc/init.d/mysql start
mysql -u root -pP@ssw0rd5308 -h 127.0.0.1