ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

When I install mysql database in linux server,I can't login in and print the error 28000...
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[root@mysqlsrv soft]# mysql -u root -p

Enter password:

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

The method :
 

1：update system config file /usr/my.cnf

[root@mysqlsrv soft]# vi /usr/my.cnf

……

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

###add next item only###

skip-grant-tables

wq!

[root@mysqlsrv soft]#

2：restart mysql service

[root@mysqlsrv soft]# service mysql restart

Shutting down MySQL...                                     [ç¡®å®]

^[[?1;2cStarting MySQL................                     [ç¡®å®]

3：Reset password again

[root@mysqlsrv ~]# mysql -u root -p

Enter password:

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

Your MySQL connection id is 4

Server version: 5.6.20-enterprise-commercial-advanced MySQL Enterprise Server - Advanced Edition (Commercial)

Copyright (c) 2000, 2014, 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> set password=password('111111');    

Query OK, 0 rows affected (0.02 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.02 sec)
 

mysql> quit

Bye

4:Recover our set

[root@mysqlsrv soft]# vi /usr/my.cnf

……

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

###delete next item only###

##skip-grant-tables

wq!



5:Restart mysql server again

[root@mysqlsrv soft]# service mysql restart

Shutting down MySQL...                                     [ç¡®å®]

^[[?1;2cStarting MySQL................                     [ç¡®å®]

6:Then,you can login in using your password.

About all install steps,you can view page http://www.solgle.com/news/?142.html