Mysql database password changes

1, modify the my.cnf

　　

 

 　　Adding skip-grant-tables in this file inside 

　　

 

 　　After the changes, save. Then restart the database

2, because my system is Centos7, the database is mariadb, so execute the command as follows;

　　

 

3, then restart the database, we do not need to re-enter the password to verify the database.

4, change your password into the database;

　　

　　[root@ub1 ~]$ mysql
　　Welcome to the MySQL monitor. Commands end with ; or \g.
　　Your MySQL connection id is 3
　　Server version: 5.7.21-0ubuntu0.16.04.1 (Ubuntu)
　　... ...
　　mysql> use mysql;
　　Reading table information for completion of table and column names
　　You can turn off this feature to get a quicker startup with -A

　　Database changed
　　mysql>

　　Modify the update password

　　UPDATE user SET password=PASSWORD('your_new_passwd')WHERE User='root';

　　It is noteworthy that mysql and mariadb is not the same, there is no password in mysql in this field, the password should be changed authentication_string;

　　

　　mysql> UPDATE user SET authentication_string=PASSWORD('root')WHERE User='root';
　　Query OK, 0 rows affected, 1 warning (0.31 sec)
　　Rows matched: 1 Changed: 0 Warnings: 1

5. After he must remember to refresh the password database, I many times before the operation was not successful because they did not refresh the database;

　　mysql> flush privileges;

6, finally /etc/my.cnfthe skip-grant-tables commented

7, restart the server, the password to take effect.

　　You need to verify the password to get into the database;

　　

 

 　 

 

　  This completes.