In this blog, we’ll discuss how to use “plugin: auth_socket” to change user password in MySQL 5.7.
In Debian/Ubuntu it is pretty common to install MySQL/Percona Server with an empty password for the root user. After everything is configured and tested, then a password is set. This is not a good practice in production servers (or soon-to-be production servers), but you can do it for your own test servers. With regards to authentication, things have changed a bit in 5.7, and methods that worked before now need a different procedure.
Let’s say that you install 5.7 and don’t specify a password. You will see the following:
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SELECT User, Host, HEX(authentication_string) FROM mysql.user; +-----------+-----------+------------------------------------------------------------------------------------+ | User | Host | HEX(authentication_string) | +-----------+-----------+------------------------------------------------------------------------------------+ | root | localhost | | |
OK, the password is empty. Let’s change it:
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mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'test'; mysql> SELECT User, Host, HEX(authentication_string) FROM mysql.user; +-----------+-----------+------------------------------------------------------------------------------------+ | User | Host | HEX(authentication_string) | +-----------+-----------+------------------------------------------------------------------------------------+ | root | localhost | | |
That doesn’t work, it’s still empty:
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mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('test'); mysql> SELECT User, Host, HEX(authentication_string) FROM mysql.user; +-----------+-----------+------------------------------------------------------------------------------------+ | User | Host | HEX(authentication_string) | +-----------+-----------+------------------------------------------------------------------------------------+ | root | localhost | | |
But why? Let’s check the warnings:
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mysql> show warnings; +---------+------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Level | Code | Message | +---------+------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Warning | 1287 | 'SET PASSWORD FOR = PASSWORD('')' is deprecated and will be removed in a future release. Please use SET PASSWORD FOR = '' instead | | Note | 1699 | SET PASSWORD has no significance for user 'root'@'localhost' as authentication plugin does not support it. | +---------+------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ |
The problem is in the note coded 1699. This user is using an authentication plugin that doesn’t support a password. Which one could it be?
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mysql> SELECT * from user where User="root"G *************************** 1. row *************************** Host: localhost User: root [...] plugin: auth_socket [...] |
Ok, auth_socket. If you install 5.7 and don’t provide a password to the root user, it will use the auth_socket plugin. That plugin doesn’t care and doesn’t need a password. It just checks if the user is connecting using a UNIX socket and then compares the username.
If we want to configure a password, we need to change the plugin and set the password at the same time, in the same command. First changing the plugin and then setting the password won’t work, and it will fall back to auth_socket again. So, run:
So, the correct way to do this is to run the following:
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ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'test'; |
And now, it works 🙂
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mysql> SELECT User, Host, HEX(authentication_string) FROM mysql.user; +-----------+-----------+------------------------------------------------------------------------------------+ | User | Host | HEX(authentication_string) | +-----------+-----------+------------------------------------------------------------------------------------+ | root | localhost | 2A39344244434542453139303833434532413146393539464430324639363443374146344346433239 | |
If your deployments use empty passwords, and you change them later on, remember to update your scripts/recipes!
Comments (30)
thanks a lot for this post. I have spent the last 24 hours recovering from failed upgrade from ubuntu 14.04 to 16.04. The upgrade of mysql failed, and left the database inaccessible. At least one of the problems turned out to be that the root password was “”. Your process above allowed me to login to the db again.
If you ever get to Portland ORE, I will buy you a beer. Cheers!
Hey Huck, I will let you know! I want that beer 😉
I could kiss you!
Oh thank you, it’s perfect. You deserve really a good bier. In France if you come, it will be with pleasure.
Beers and kisses are always welcome 😛 Glad to see you have found the post useful. Thanks for the feedback.
If the commande “ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘test’;” doesn’t work you can try :
UPDATE mysql.user SET authentication_string = PASSWORD(‘test’), plugin = ‘mysql_native_password’ WHERE User = ‘root’ AND Host = ‘localhost’;
FLUSH PRIVILEGES;
It worked for me.
Thanks for the hint, anyway !
thank you very much it work for me too.
Hi,
When I tried what is suggested in this article I get the following problem:
mysql> ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘RSbj1409’;
ERROR 1396 (HY000): Operation ALTER USER failed for ‘root’@’localhost’
When I tried what you have suggested I get this:
UPDATE mysql.user SET authentication_string = PASSWORD(‘test’), plugin = ‘mysql_native_password’ WHERE User = ‘root’ AND Host = ‘localhost’;
ERROR 1054 (42S22): Unknown column ‘‘root’’ in ‘where clause’
Could you please suggest what else I could try to resolve this?
Thanks.
you should replace all single quotation marks with English keyboard ” ‘ ” .
Thanks man, Worked like a charm…
I had the same problem as Huck after upgrading Ubuntu to 16.04. It’s frustrating when you need access to your database but you can’t. I’m using GnuCash with a MySQL database. This post solved my problems.
Thank you, you saved me from a lot of frustration and searching for a solution.
Thank you so much, you saved my laptop from being destroyed by an angry fist of death just now
thank you very much for this post 🙂
Thanks a lot! You saved a lot of time!
fresh install percona in ubuntu 14.04 :
i cant get root password
and i tried to login into
mysql -u root -p
always fail
how to login to mysql root with blank password (fresh install)
i didn’t understand socket auth things
thanks
That is exactly what I was looking from an hour or so.
Thanks man!
Thanks a lot, this worked perfectly for Ubuntu 16.04.
This is actually the only thing that really works out of the box with a simple statement… there are lots of posts on Stackoverflow and other sites with complex solutions (that don’t work) and require you to start mysql in safe mode.
Many thanks Miguel! I was having problems accessing our Mantis Bug Tracking DB after an upgrade from Ubuntu 12.04 to 16.04. We had a blank password. None of the other methods that I found on Google worked – until I found this one.
Using MariaDB and i have sort of the same problem.
It seems my installation is useing the auth_socket plugin but the query’s listed did not help me change/set the password.
At the moment i don’t have root acces.
ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘test’
comes back with the error:
ALTER: command not found
and:
UPDATE mysql.user SET authentication_string = PASSWORD(‘test’), plugin = ‘mysql_native_password’ WHERE User = ‘root’ AND Host = ‘localhost’;
comes back with the following:
ERROR 1054 (42S22): Unknown column ‘‘root’’ in ‘where clause’
This is after logging in to MariaDB with sudo mysql.
Should be root acces to the database server.
Also i only get to see an -> when i execute the query:
SELECT user,host FROM mysql.user
Facing a very similar issue with MySQL. Did you figure out what can be done?
YOU FREAKING SAVED MY COMPUTER FROM BEING TOSSED OUT THE WINDOW!!!
I was looking for 2 hours how to set this ********* password, thank you very much !!!
You saved me!!!!!! Thank you xoxoxoxo
Yes, this solution works, great.
Thanks for your solution. I have a fresh installation with ubuntu server 18.04 and phpmyadmin had no permissions at all.
Thank you for this, I could see the problem but was not finding any way to change the authentication type for the root user. Your solution finally worked.
Hi,
I think this is the closest I have reached to solving this problem, but I’m still not done.
Here is the error message I see when I do as you’ve suggested in this article:
mysql> ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘test’;
ERROR 1396 (HY000): Operation ALTER USER failed for ‘root’@’localhost’
Could you please see what else I could do to resolve this?
Thanks.
Finally a solution that works! Thanks so much. In summary I had to do
sudo mysql -u root
use mysql;
ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘test’;
Thank you Thank you Thank you. I’ve spent hours of research over two days. This is the only thing that worked.
Fresh install of apt install mysql-server from ubuntu 18.10 repository. No root password (or any access).to mysql
My Fix:
sudo mkdir /var/run/mysqld
sudo chown mysql:mysql /var/run/mysqld
sudo service mysql stop
sudo mysqld_safe –skip-grant-tables –user=mysql &
mysql
>FLUSH PRIVILEGES;
>ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘your_new_password’;
>EXIT;
The FLUSH PRIVILEGES was a requirement. Throws skip-grant-tables error if you don’t.
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