What is the default root pasword for MySQL 5.7

Question

Cannot login to MySQL database after fresh install with root ID and empty/no password like other older MySQL versions do

Answer 1

There's so many answers out there saying to reinstall mysql or use some combo of

mysqld_safe --skip-grant-tables

and / or

UPDATE mysql.user SET Password=PASSWORD('password')

and / or something else ...

... None of it was working for me

---

Here's what worked for me, on Ubuntu 18.04, from the top

With special credit to this answer for digging me out of the frustration on this ...

$ sudo apt install mysql-server
$ sudo cat /etc/mysql/debian.cnf

Note the lines which read:

user     = debian-sys-maint
password = blahblahblah

Then:

$ mysql -u debian-sys-maint -p
Enter password: // type 'blahblahblah', ie. password from debian.cnf

mysql> USE mysql
mysql> SELECT User, Host, plugin FROM mysql.user;
+------------------+-----------+-----------------------+
| User             | Host      | plugin                |
+------------------+-----------+-----------------------+
| root             | localhost | auth_socket           |
| mysql.session    | localhost | mysql_native_password |
| mysql.sys        | localhost | mysql_native_password |
| debian-sys-maint | localhost | mysql_native_password |
+------------------+-----------+-----------------------+
4 rows in set (0.00 sec)

mysql> UPDATE user SET plugin='mysql_native_password' WHERE User='root';
mysql> COMMIT;  // When you don't have auto-commit switched on

Either:

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';

Or:

// For MySQL 5.7+
UPDATE mysql.user SET authentication_string=PASSWORD('new_password') where user='root';

Then:

mysql> FLUSH PRIVILEGES;
mysql> COMMIT;  // When you don't have auto-commit switched on
mysql> EXIT

$ sudo service mysql restart
$ mysql -u root -p
Enter password: // Yay! 'new_password' now works!

Answer 2

MySQL 5.7 changed the secure model: now MySQL root login requires a sudo

The simplest (and safest) solution will be create a new user and grant required privileges.

1. Connect to mysql

sudo mysql --user=root mysql

2. Create a user for phpMyAdmin

CREATE USER 'phpmyadmin'@'localhost' IDENTIFIED BY 'some_pass';
GRANT ALL PRIVILEGES ON *.* TO 'phpmyadmin'@'localhost' WITH GRANT OPTION;
FLUSH PRIVILEGES;

Reference - https://askubuntu.com/questions/763336/cannot-enter-phpmyadmin-as-root-mysql-5-7

Answer 3

In case you want to install mysql or percona unattended (like in my case ansible), you can use following script:

# first part opens mysql log
# second part greps lines with temporary password
# third part picks last line (most recent one)
# last part removes all the line except the password
# the result goes into password variable

password=$(cat /var/log/mysqld.log | grep "A temporary password is generated for" | tail -1 | sed -n 's/.*root@localhost: //p')

# setting new password, you can use $1 and run this script as a file and pass the argument through the script

newPassword="wh@teverYouLikE"

# resetting temporary password

mysql -uroot -p$password -Bse "ALTER USER 'root'@'localhost' IDENTIFIED BY '$newPassword';"

Answer 4

I to was experiencing the same problem and the only thing I was able to do to make it work was to go this route:

drop user admin@localhost;
flush privileges;
create user admin@localhost identified by 'admins_password'

This allowed me to recreate my username and enter a password for the user name.

Answer 5

After a lot of try, I could reset the default password with the following commands (Ubuntu and derivatives):

sudo -i
mkdir -p /var/run/mysqld
chown mysql:mysql /var/run/mysqld
/etc/init.d/mysql stop
mysqld_safe --skip-grant-tables &
mysql -uroot
use mysql;
update user set authentication_string=password('YOURPASSWORD') where user='root';
update user set plugin="mysql_native_password" where User='root';  
flush privileges;
quit;
sudo /etc/init.d/mysql stop
sudo /etc/init.d/mysql start

Sometimes, even after typed in the terminal

mkdir -p /var/run/mysqld
chown mysql:mysql /var/run/mysqld
/etc/init.d/mysql stop
mysqld_safe --skip-grant-tables &

I got the error that the mysqld don't exists. So, quit, and type the same commands again.

And the final command

sudo /etc/init.d/mysql start

Sometimes doesn't work. Only after restart the computer.

Answer 6

As of Ubuntu 20.04 with MySql 8.0 : you can set the password that way:

1. login to mysql with sudo mysql -u root

2. change the password:

USE mysql;
UPDATE user set authentication_string=NULL where User='root';
FLUSH privileges;
ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'My-N7w_And.5ecure-P@s5w0rd';
FLUSH privileges;
QUIT

now you should be able to login with mysql -u root -p (or to phpMyAdmin with username root) and your chosen password.

P,S:

You can also login with user debian-sys-maint, the password is written in the file /etc/mysql/debian.cnf