Home Database Mysql Tutorial mysql ERROR 1044 (42000): Access denied for user ''@'localho_MySQL

mysql ERROR 1044 (42000): Access denied for user ''@'localho_MySQL

May 30, 2016 pm 05:10 PM
access denied for mysql user

1. 问题描述:

在MySQL控制台下创建数据库出现以下信息:

mysql> CREATE DATABASE python;
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'python'

2. 解决方法:

执行以下命令进入控制台:

mysql --user=root -p

输入root用户的密码即可进入mysql控制台:

创建数据库:

create database python;

显示所有数据库:

show databases;

如下:

www.linuxidc.com @www.linuxidc.com:~$ mysql --user=root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.6.17 MySQL Community Server (GPL)

Copyright (c) 2000, 2014,Oracleand/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> create database python;
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| python |
| test |
+--------------------+
5 rows in set (0.02 sec)

mysql>

3. OK, 以上方法不是最好的, 但却是简单可行的,Enjoy it!!!

4、方法四:

这几天用空密码登录mysql后,然后修改mysql默认密码,使用mysql表出现过这个问题,提示:ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'mysql'。网上找了一些方法,终于搞定了。

我用的是xampp集成的mysql,之前空密码能登进去phpmyadmin,但怎么也进不去phpmyadmin的系统表

后来解决成功发现是因为mysql数据库的user表里,存在用户名为空的账户即匿名账户,导致登录的时候是虽然用的是root,但实际是匿名登录的,通过错误提示里的''@'localhost'可以看出来。我用方法一解决了问题,

方法一:
在my.ini的[mysqld]字段加入:

skip-grant-tables

重启mysql服务,这时的mysql不需要密码即可登录数据库
然后进入mysql

mysql>use mysql;
mysql>update user set password=password('新密码') WHERE User='root';
mysql>flush privileges;

运行之后最后去掉my.ini中的skip-grant-tables,重启mysqld即可。

修改mysql密码方法二:
不使用修改my.ini重启服务的方法,通过非服务方式加skip-grant-tables运行mysql来修改mysql密码
停止mysql服务
打开命令行窗口,在bin目录下使用mysqld-nt.exe启动,即在命令行窗口执行: mysqld-nt --skip-grant-tables
然后另外打开一个命令行窗口,登录mysql,此时无需输入mysql密码即可进入。
按以上方法修改好密码后,关闭命令行运行mysql的那个窗口,此时即关闭了mysql,如果发现mysql仍在运行的话可以结束掉对应进程来关闭。
启动mysql服务。

linux下的处理方法:

mysql> use mysql
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'mysql'
mysql> exit
Bye
[root@testtest ~]# service mysqld stop 
Stopping mysqld:                      [ OK ]
[root@testtest ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking & 

[root@testtest ~]# mysql -u root -p -hlocalhost
Enter password: 

mysql> use mysql

mysql> SELECT host,user,password,Grant_priv,Super_priv FROM mysql.user;

mysql> UPDATE mysql.user SET Grant_priv='Y', Super_priv='Y' WHERE User='root';

mysql> FLUSH PRIVILEGES;

mysql> GRANT ALL ON *.* TO 'root'@'localhost';

mysql> GRANT ALL ON *.* TO 'root'@'cn.cn.cn.cn';

mysql> GRANT ALL ON *.* TO 'root'@'245.245.245.245';

mysql> GRANT ALL ON *.* TO 'root'@'127.0.0.1';

mysql> FLUSH PRIVILEGES;


mysql> quit
Bye
[root@testtest ~]# service mysqld start 

restart Linux/OS 
Copy after login

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