mysql5.7 forgot root password

 I believe that many of my friends have the same experience as me. After installing mysql on a virtual machine, they forgot the root password after a period of time. embarrassment.......

Especially after version 5.7, a large number of blogs or posts on the Internet about the method of resetting the root password are not available, and I am also a victim. Later, I got a method on google, and it is feasible to test it personally, record it and share it with everyone...............

My system version: centos7

 

1. Stop the mysql service:

systemctl stop mysqld

 

2. Set mysql environment parameters 

systemctl set-environment MYSQLD_OPTS="--skip-grant-tables"

 

3. Start the mysql service

systemctl start mysqld

 

4. Login as root user

mysql -u root

 

5. Set a new password

mysql> UPDATE mysql.user SET authentication_string = PASSWORD('MyNewPassword')  WHERE User = 'root' AND Host = 'localhost';

mysql> FLUSH PRIVILEGES;

mysql> quit

 

6. Stop the mysql service

systemctl stop mysqld

 

7. Cancel the environment parameters set in the second step 

systemctl unset-environment MYSQLD_OPTS

 

8. Start the mysql service 

systemctl start mysqld

 

9. Login with new password 

mysql -u root -p

10. Done!