You may recover the Joomla administrator password in two ways: using password reminder or reset the super administrator password via SQL query.
How to recover the Joomla administrator password using password reminder
If you remember the super aministrator password you may enter your website and use the password reminder function. To do it type in the browser bar: (insted of your_domain specify the address of your website): http://your_domain/index.php?option=com_registration&task=lostPassword
Then enter the login and the password of the super administrator account and press “Send the password” button. The new password will be sent to the super administrator account.
How to reset the super administrator password via SQL query
If there is no possibility to recover your password via password reminder you may reset the administrator password using SQL request.
You will need to connect to the website database and do the following SQL query (for example with phpMyAdmin):
UPDATE `jos_users` SET password='21232f297a57a5a743894a0e4a801fc3' WHERE id = 62;
When the SQL query is run, the password of the super admin will be “admin”. Do not forget to change the password in the admin panel.
You can also specify the new password in the query:
UPDATE `jos_users` SET password= MD5( 'new_password' ) WHERE id = 62;
where new_password is your new password.
Congratulations! You just successfully recovered your Joomla administrator password!