ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'mysql'

ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'mysql'

mysql> use mysql
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'mysql'
mysql> exit

解决mysql"Access denied for user'root'@'IP地址'"问题

Access denied for us

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出现这种问题，主要的原因就是权限配置的时候 没有配置正确。

解决方法如下：

（1）登陆进MySQL 时， mysql -u root -p

（2）show grants; 会出现root如下的权限表示：GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '565491d704013245' WITH GRANT OPTION

解释：

grant 权限1,权限2,…权限n on 数据库名称.表名称 to 用户名@用户地址 identified by ‘连接口令’;

（3）grant all privileges on *.* to 'root'@'%' with grant option;

（4）FLUSH PRIVILEGES;

（5）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