Forgot mysql password change password method

1. Modify MySQL login settings:
# vi /etc/my.cnf
Add a sentence to the [mysqld] section: skip-grant-tables
For example:
[mysqld]
datadir=/var/lib/mysql
socket=/var/ lib/mysql/mysql.sock
skip-grant-tables

3. 4. Restart mysqld

. Log in and modify the root password of MySQL. /usr
/bin/mysql -u root -p
press Enter to enter mysql
mysql> USE mysql ; 
mysql> UPDATE user SET Password = password ( 'new-password' ) WHERE User = 'root '
Note: mysql 5.7 passwrod field has become authentication_string 

5. Modify the MySQL login settings back
# vi /etc/my.cnf
Delete the skip-grant-tables added in the [mysqld] section

6. restart mysqld