How to Reset the MySQL Root Password

http://dev.mysql.com/doc/refman/5.6/en/resetting-permissions.html

cat /etc/my.conf
...
[mysqld]
##add parameter##
skip-grant-tables <=without password login
skip-networking <=prevent remote clients from connecting

[root@dbdou02 tmp]# mysql -uroot -proot
mysql> FLUSH PRIVILEGES;
mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('DOUdou123#');

cat /etc/my.conf
...
[mysqld]
##remove parameter##
#skip-grant-tables
#skip-networking

[root@dbdou02 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.29 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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>

##MySQL root password reset is successful!##

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How to Reset the MySQL Root Password

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