Access denied for user 'root@localhost' (using password:NO)

Question

I\'m new to MySQL, I\'m trying to run WordPress in my Windows desktop and it needs MySQL.

I install everything with Web Platform Installer which is prov

Answer 1

You can reset your root password. Have in mind that it is not advisable to use root without password.

Answer 2

if you changed the port to non standard one, then you need to specify it:

$connection = mysqli_connect('localhost:3308', 'root', '', 'loginapp');

Answer 3

for this kind of error; you just have to set new password to the root user as an admin. follow the steps as follows:

[root ~]# mysql -u root
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password:NO)

1. Stop the service/daemon of mysql running

   [root ~]# service mysql stop   
   mysql stop/waiting
   

2. Start mysql without any privileges using the following option; This option is used to boot up and do not use the privilege system of MySQL.

   [root ~]# mysqld_safe --skip-grant-tables &
   

At this moment, the terminal will seem to halt. Let that be, and use new terminal for next steps.

3. enter the mysql command prompt

   [root ~]# mysql -u root
   mysql> 
   

4. Fix the permission setting of the root user ;

   mysql> use mysql;
   Database changed
   mysql> select * from  user;
   Empty set (0.00 sec)
   mysql> truncate table user;
   Query OK, 0 rows affected (0.00 sec)
   mysql> flush privileges;
   Query OK, 0 rows affected (0.01 sec)
   mysql> grant all privileges on *.* to root@localhost identified by 'YourNewPassword' with grant option;
   Query OK, 0 rows affected (0.01 sec)
   

*if you don`t want any password or rather an empty password

    mysql> grant all privileges on *.* to root@localhost identified by '' with grant option;
    Query OK, 0 rows affected (0.01 sec)*
    mysql> flush privileges;
    Query OK, 0 rows affected (0.00 sec)

Confirm the results:

    mysql> select host, user from user;
+-----------+------+
| host      | user |
+-----------+------+
| localhost | root |
+-----------+------+
1 row in set (0.00 sec)

5. Exit the shell and restart mysql in normal mode.

   mysql> quit;
   [root ~]# kill -KILL [PID of mysqld_safe]
   [root ~]# kill -KILL [PID of mysqld]
   [root ~]# service mysql start
   

6. Now you can successfully login as root user with the password you set

    [root ~]# mysql -u root -pYourNewPassword 
    mysql> 
   

Answer 4

If you are using XAMPP just go to C:\xampp\phpMyAdmin and then open config.inc.php find $cfg['Servers'][$i]['password'] = '' line and put your password there.

Answer 5

Some times it just happens due to installation of Wamp or changing of password options of root user. One can use privilages-->root (user) and then set password option to NO to run the things without any password OR set the password and use it in the application.

Answer 6

I was getting the same error on OS X El captain. Mysql version 5.7 . I was able to connect to mysql with root after executing these steps.

Stop the mysql server

sudo mysql.server stop

Start mysql in safe mode

sudo mysqld_safe --skip-grant-tables

Using mysqld, Change the database to mysql and update the details for user 'root'.

show databases;
use mysql;
UPDATE mysql.user 
    SET authentication_string = PASSWORD('MyNewPass'), password_expired = 'N'
    WHERE User = 'root' AND Host = 'localhost';
exit;

After that kill the 'mysqld_safe' process and start mysql normally. You should be able to login to mysql using root and new password. SQL docs for more details