MySQL root password change

I have been trying to reset my MySQL root password. I have run mysqld_safe --skip-grant-tables, updated the root password, and checked the user table to make sure it is there.

Once restarting the MySQL daemon I tried logging in with the new root password that I just set and still get Access denied for user 'r开发者_开发知识库oot' errors. I have also tried completely removing and reinstalling MySQL (including removing the my.cnf file) and still no luck. What can I do next?

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SET PASSWORD FOR 'root'@'localhost' = PASSWORD('mypass');
FLUSH PRIVILEGES;

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ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

You can find Resetting the Root Password in the MySQL documentation.

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Have a look at this from the MySQL reference manual:

First log in to MySQL:

mysql -u root -p

Then at the mysql prompt, run:

UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root';

Then

FLUSH PRIVILEGES;

Look at this page for more information: Resetting the Root Password: Unix Systems

UPDATE:

For some versions of mysql, the password column is no longer available and you'll get this error:

ERROR 1054 (42S22): Unknown column 'Password' in 'field list'

In this case, use ALTER USER as shown in the answer below.

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Please follow the below steps.

1. sudo service mysql stop
2. sudo mysqld_safe --skip-grant-tables
3. sudo service mysql start
4. sudo mysql -u root
5. use mysql;
6. show tables;
7. describe user;
8. update user set authentication_string=password('1111') where user='root';
9. FLUSH PRIVILEGES;

Log in with password "1111".

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This is the updated answer for WAMP v3.0.6 and up.

In the MySQL command-line client, phpMyAdmin or any MySQL GUI:

UPDATE mysql.user
SET authentication_string=PASSWORD('MyNewPass')
WHERE user='root';

FLUSH PRIVILEGES;

In MySQL version 5.7.x there is no more password field in the MySQL table. It was replaced with authentication_string. (This is for the terminal/CLI.)

In the MySQL command-line client, phpMyAdmin or any MySQL GUI:

UPDATE mysql.user SET authentication_string=PASSWORD('MyNewPass') WHERE user='root';

FLUSH PRIVILEGES;

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I searched around as well and probably some answers do fit for some situations,

my situation is Mysql 5.7 on a Ubuntu 18.04.2 LTS system:

(get root privileges)

$ sudo bash

(set up password for root db user + implement security in steps)

# mysql_secure_installation

(give access to the root user via password in stead of socket)

(+ edit: apparently you need to set the password again?)

(don't set it to 'mySecretPassword'!!!)

# mysql -u root

mysql> USE mysql;
mysql> UPDATE user SET plugin='mysql_native_password' WHERE User='root';
mysql> set password for 'root'@'localhost' = PASSWORD('mySecretPassword'); 
mysql> FLUSH PRIVILEGES;
mysql> exit;

# service mysql restart

Many thanks to zetacu (and erich) for this excellent answer (after searching a couple of hours...)

Enjoy :-D

S.

Edit (2020):

This method doesn't work anymore, see this question for future reference...

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I found it! I forgot to hash the password when I changed it. I used this query to solve my problem:

update user set password=PASSWORD('NEW PASSWORD') where user='root';

I forgot the PASSWORD('NEW PASSWORD') and just put in the new password in plain text.

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On MySQL 8.0.4+

To update the current root user:

select current_user();
set password = 'new_password';

To update another user:

set password for 'otherUser'@'localhost' = 'new_password';

To set the password policy before updating the password:

set global validate_password.policy = 0;
set password = 'new_password';
set password for 'otherUser'@'localhost' = 'new_password';

Another / better way to update the root password:

mysql_secure_installation

Do you want to stick with 5.x authentication, so you can still use legacy applications?

In my.cnf file

default_authentication_plugin = mysql_native_password

To update root:

set global validate_password.policy = 0;
alter user 'root'@'localhost' identified with mysql_native_password by 'new_password';

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On MySQL 8 you need to specify the password hashing method:

ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'new-password';

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This worked for me -

ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

Chapter 4 Resetting the Root Password: Windows Systems

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For MySQL 5.7.6 and later:

ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

For MySQL 5.7.5 and earlier:

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPass');

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For me, only these steps could help me setting the root password on version 8.0.19:

mysql
SELECT user,authentication_string FROM mysql.user;
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'your_pass_here';
FLUSH PRIVILEGES;
SELECT user,authentication_string FROM mysql.user;

If you can see changes for the root user, then it works. Source: Can't set root password MySQL Server

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You have to reset the password! Steps for Mac OS X (tested and working) and Ubuntu:

Stop MySQL

sudo /usr/local/mysql/support-files/mysql.server stop

Start it in safe mode:

sudo mysqld_safe --skip-grant-tables

(The above line is the whole command.)

This will be an ongoing command until the process is finished, so open another shell/terminal window and log in without a password:

mysql -u root

mysql> UPDATE mysql.user SET Password=PASSWORD('password') WHERE User='root';

Start MySQL

sudo /usr/local/mysql/support-files/mysql.server start

Your new password is 'password'.

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Using the mysqladmin command-line utility to alter the MySQL password:

mysqladmin --user=root --password=oldpassword password "newpassword"

Source

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For the current latest MySQL version (8.0.16), none of these answers worked for me.

After looking at several different answers and combining them together, this is what I ended up using that worked:

update user set authentication_string='test' where user='root';

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I tried the answer from kta, but it didn't work for me.

I am using MySQL 8.0.

This worked for me in the MySQL command-line client (executable mysql):

SET PASSWORD FOR 'root'@'localhost' = 'yourpassword'

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This is for Mac users.

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On 8.0.15 (maybe already before that version) the PASSWORD() function does not work. You have to do:

Make sure you have Stopped MySQL first (above). Run the server in safe mode with privilege bypass:

sudo mysqld_safe --skip-grant-tables

Replace this mysqld_safe with your MySQL path like in my case it was

sudo /usr/local/mysql/bin/mysqld_safe –skip-grant-tables

then you have to perform the following steps.

mysql -u root

UPDATE mysql.user SET authentication_string=null WHERE User='root';
FLUSH PRIVILEGES;
exit;

Then

mysql -u root

ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'yourpasswd';

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Now just use:

SET PASSWORD FOR <user> = '<plaintext_password>'

Because 'SET PASSWORD FOR <user> = PASSWORD('<plaintext_password>')' is deprecated and will be removed in a future release.(Warning in 04/12 2021) Please use SET PASSWORD FOR <user> = '<plaintext_password>' instead.

Update 04/12 2021 AM 2:22:07 UTC/GMT -5 hours.

Use the following statement to modify directly in the mysql command line:

mysql> SET PASSWORD FOR'root'@'localhost' = PASSWORD('newpass');

or 1.The terminal enters the bin directory of MySQL

cd /usr/local/mysql/bin

2.Open MySQL

mysql -u root -p

3.At this time you can use your default password

4.Perform operations in MySQL at this time

show databases;

5.You will be prompted to reset the root user password.

So how to reset the root password? I checked a lot of information but it didn’t take effect.

Including entering to modify the database in safe mode, using the mysqladmin command: "Mysqladmin -u root password"your-new-password"" etc., Will not work.

The correct steps are as follows:

1.It is still in the cd /usr/local/mysql/bin/ directory

2.sudo su

After entering, you will be asked to enter your computer password.

When you enter it, nothing is displayed. After you enter it, press Enter

Then press enter

3.Cross the authorization verification

sh-3.2# ./mysqld_safe --skip-grant-tables &

If the execution of the command is stopped, and the execution has been completed at this time,

press Enter directly, and then exit to exit:

sh-3.2# exit

4.Re-enter MySQL at this time, no -p parameter, no password

./mysql -u root

5.Select the database MySQL (here MySQL refers to a database in MySQL,

there are other databases in MySQL, you can view it through show databases;)

use mysql;

6.Update the password of the root user in the database table:

update user set authentication_string=‘123456’ where User='root';

Note: The password field here is authentication_string,

not the password circulated on the Internet.

It is estimated that MySQL was updated later.

Re-enter MySQL and use the password you just set, is it all right?

Because you have just set to bypass the authorization authentication,

you can log in to MySQL directly without a password.

My stupid way is to restart the computer and log in to MySQL with the password again to see if the modification is effective;

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Update from 2022

I've tried a few of the answer but the one that works for me is the following

ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

Courtesy of StrongDM

Note: I'm using the MySql client for Windows 10 and I'm also logging as the root user.

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In MySQL 5.7, the password is replaced with 'authentication_string'. Use

update user set authentication_string=password('myfavpassword') where user='root';

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So many comments, but I was helped by this method:

sudo mysqladmin -u root password 'my password'

In my case after installation I had got the MySQL service without a password for the root user, and I needed to set the password for my security.

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A common error I run into from time to time, is that I forget the -p option, so be sure to use:

mysql -u root -p

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Or just use interactive configuration:

sudo mysql_secure_installation

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For macOS users, if you forget your root password, thusharaK's answer is good, but there are a few more tricks:

If you are using a system preference to start MySQL serverside, simply

sudo mysqld_safe --skip-grant-tables

might not work for you.

You have to make sure the command-line arguments are the same with the system start configuration.

The following command works for me:

/usr/local/mysql/bin/mysqld --user=_mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --log-error=/usr/local/mysql/data/mysqld.local.err --pid-file=/usr/local/mysql/data/mysqld.local.pid --keyring-file-data=/usr/local/mysql/keyring/keyring --early-plugin-load=keyring_file=keyring_file.so --skip-grant-tables

You can use

ps aux | grep mysql

to check your own.

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Exit from WAMP and Stop all WAMP services.

Open Notepad and then type:

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('');

Then save it to the C: drive with any name... like this "c:/example.txt"

Now go to your "wamp" folder: wamp → bin → mysql → mysql (your version) → bin

In my case the path is "C:\wamp\bin\mysql\mysql5.6.17\bin".

Now copy your path, run CMD with (Ctrl + R), and then type "cmd" (Enter).

Type cd, right click on CMD, and paste the path (Enter).

Now type (mysqld --init-file=C:\\example.txt) without braces and (Enter).

Then restart the PC or open Task Manager and kill mysqld.exe.

Start WAMP and your password will be removed...

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Resetting root password.

1. sudo mysql --defaults-file=/etc/mysql/debian.cnf

2. alter user 'root'@'localhost' identified with mysql_native_password by 'new_password';

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The other answers did not work for me.

That said, here is how I did it for the password change to the root SQL profile if you can log in already.

While logged in:

Tool Bar -> Servers -> Users and Privileges -> select root - > from here you can change the password, or expire it and change it in the login.

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On Ubuntu,

sudo dpkg-reconfigure mysql-server-5.5

Replace 5.5 with your current version and you will be asked for the new root password.

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1. On Mac open system preferences   MySQL.

2. In the configuration section of MySQL, check for "Initialize Database".

3. Change the password in the prompt.