Today, I want to write about Change the Password Directly from Database on Joomla 3.4 Hosting. First, If the admin user is already defined, the best way is to vary the password within the database to a known password. This method requires that you just have direct access to the MySQL database using phpMyAdmin or another client.

Cautions: change your password after login

Following steps show how to manually reset a password to the word - "Admin"

1. Open phpMyAdmin and choose the database of your Joomla web site. On the Left Top side of the dropdown list will appear. It'll show all the database tables.
2. Find a table  " prefix_users" in the list of tables (note: prefix can depend upon your prefix value.).
3. Click on the "Browse" button in the top toolbar. it'll show all of the users for this web site.
4. Click on the " Edit icon " for user whose word you would like to change.
5. Modify password value to the following 
09b135d0d2022f04d1d679afec90cfc6:9z78xfHz0TFnmI8d4jHtvmk0QxayQJUv 

into the password field and press the Go button.
6. Log in with this user and password (Admin).
7. Then, after you logging again, change password from user Manager for this user.
8. Now, Select all of the users in User manager and also modify the password of others if your website was hacked.