MySQL set up remote account login

---- Author Attilax , [email protected]

In order to set a remote connection permission for MYSQL users , it has gone through many twists and turns . It is hereby recorded . First, Yu arrived at the 2003 error

ERROR 2003 (HY00

The reason is that MySQL takes into account security factors, the default configuration only allows local login

Open the /etc/mysql/my.cnf file, find bind-address = 127.0.0.1 and change it to bind-address = 0.0.0.0

Restart mysql: sudo /etc/init.d/mysql restart

Connected again , error 1045 occurred

ERROR 1045 (28000): Access denied for user 'test'@'x.x.x.x' (using password: NO)

A: The reason is that the login user name is not set with the permission to log in to the remote host. There is also a possibility that you need to reset the password ... It may be that the authorized operation causes this sequelae ..

Modify the Host field of the corresponding user name in the user table in the MySQL database , and change localhost to %

use mysql;

update user set Host = '%' where User = 'username';

Giving this setting permission requires the ROOT user to log in. Unfortunately , the ROOT password cannot be remembered .

Retrieve the ROOT password and set up remote login

mysqld_safe --skip-grant-tables &

mysql -u root mysql

mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';

mysql> FLUSH PRIVILEGES;

Set ROOT remote connection update user set host = '%' where user='root';

View the process , you can see the MYSQLD_SAFE and MYSQL processes , at this time MYSQL can be used normally , but check the parameters , you can see --skip-grant-tab

Enter the mysqld_safe command line, and immediately enter mysql -u root mysql without any mistakes . Or you can open a new window .

1062 error when doing UPDATE

RROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'

If ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY' error occurs when executing the update statement , it means that there are multiple ROOT users recorded in the USER table .

需要select host from user where user = 'root';

Check to see if the host already has the value of % , and that's it .

mysql> select host,user from user where user='root';

+-----------------------+------+

| host | user |

+-----------------------+------+

| % | root |

| 127.0.0.1 | root |

| ::1 | root |

| localhost.localdomain | root |

Then log in with the ROOT user to change the remote connection permissions of the user account . A prompt appears: ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'mysql' .

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

It is because in the user table of the mysql database , there is an account with an empty user name, that is, an anonymous account. As a result, although root is used when logging in , it is actually logged in anonymously. You can log in through ''@'localhost' in the error prompt. See, so the solution see

First close the MYSQL process ..

Then

# mysqld_safe --skip-grant-table

The screen appears: Starting demo from .....

At this point, remember to enter

# mysql -u root mysql

mysql> delete from user where USER='';

mysql> FLUSH PRIVILEGES;

If there is Starting demo from .. after .. enter other commands first , then use mysql -u root mysql . It will show this error again .

Then KILL off the MYSQL process , .. restart the normal process ..

Set the user's remote host connection permission

update user set host = '%' where user='fanzkcom_fanzk';

FLUSH PRIVILEGES;

But in the actual connection, although it can be connected , it does not have the permission of the library where it is located , halo .

Just set the permissions next

Set permissions for users and libraries

grant all privileges on fanzkcom_fanzk.* to fanzkcom_fanzk@'%' identified by '1234';

FLUSH PRIVILEGES;

There must be single quotes around the percent sign , otherwise the syntax is wrong

Then when connecting, it even prompted 1045 error. Halo , after thinking about it for a long time , I still reset the password and try it .

update mysql.user set password=password('XXX') where User="fanzkcom_fanzk"

flush privileges;

It turned out to be good . Halo . I don't know why the password will be changed when setting authorization . Strange .. It should be a MYSQL bug