ERROR 1045 (28000): Access denied for user root@localhost (using password: NO)

CentOS命令登录MySQL时，报错ERROR 1045 (28000): Access denied for user root@localhost (using password: NO)错误解决方法

1、停用mysql服务：# /etc/rc.d/init.d/mysqld stop

2、输入命令：# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

3、登入数据库：# mysql -u root mysql

4、mysql> use mysql; 结果如下：

Database changed

5、mysql> UPDATE user SET Password=PASSWORD('newpassword')where USER='newuser';

结果如下：

Query OK, 3 rows affected (0.00 sec)

Rows matched: 3 Changed: 3 Warnings: 0

mysql> FLUSH PRIVILEGES;

结果如下：

Query OK, 0 rows affected (0.00 sec)

mysql> quit

# /etc/init.d/mysql restart

# mysql -u newuser –p

Enter password: newpassword

mysql><登录成功>