how can i recover Lost Joomla admin password ?

On cPanel dedicated server, I have come around where people have lost their Joomla admin password and don’t know what to do. Don’t get panicked, be patient – I will show how you can reset your lost admin password for your Joomla website.

First within you cPanel control panel; goto PHPMyAdmin and select the Joomla database that you have, once selected check for the table named jos_users click on it and browse the table; on the right side you will see your admin login name (I assume it is admin, some may have different as they have set when Joomla was installed) in front of the username under the column named “password” you will see some encrypted value make sure the “usertype” column contains “super administrator”. Now, click on the pencil (to edit) and in front of password put the value “21232f297a57a5a743894a0e4a801fc3” without the quotes, which means that your password is “admin” and click on “Go”. That’s all , you have reset the password.

Now, you can check by logging in to your Joomla site. It should be working now.
Note: Works for both Joomla 1.0 and Joomla 1.5 versions.  source