mysql Access denied for user ‘root’@’localhost’ (using password: YES)解决方法

今天在启动MysqL时出现以下问题：

[root@www ~]# MysqL -u root -p
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

网上的答案是各种各样的，最终解决问题的方法总结为以下，好多都是没有设置初始密码造成此问题的。

解决方法如下：

[root@www ~]# service MysqLd stop   #先关闭MysqL服务
Stopping MysqLd:                      [ OK ]
[root@www ~]# MysqL
ERROR 2002 (HY000): Can't connect to local MysqL server through socket '/var/lib/MysqL/MysqL.sock' (2)
[root@www ~]# MysqL -u root -p      #关闭服务后又出现如下问题
Enter password: 
ERROR 2002 (HY000): Can't connect to local MysqL server through socket '/var/lib/MysqL/MysqL.sock' (2)
[root@www ~]# MysqL -u root MysqL    #键入此命令进入MysqL
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MysqL monitor. Commands end with ; or \g.
Your MysqL connection id is 1
Server version: 5.1.73 Source distribution
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> update user set password=password('123') where user='root' and host='localhost';  ---->修改root的密码
Query OK,1 row affected (0.04 sec)
Rows matched: 1 Changed: 1 Warnings: 0
MysqL> flush priviledge;
ERROR 1064 (42000): You have an error in your sql Syntax; check the manual that corresponds to your MysqL server version for the right Syntax to use near 'priviledge' at line 1
MysqL> flush privileges;
Query OK,0 rows affected (0.00 sec)
MysqL> \q
Bye
[root@www ~]# MysqL -u root -p           ------>重新进入
Enter password: 
Welcome to the MysqL monitor. Commands end with ; or \g.
Your MysqL connection id is 2
Server version: 5.1.73 Source distribution
copyright (c) 2000,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> \q
Bye

到此就完了！！