How to edit footer or modified footer in magento?

Want to edit footer or modified footer in magento follow these steps

For the frontend:
app\design\frontend\default\default\template\page\html\footer.phtml

For the backend:
(If you want to edit footer in back end):
app\design\adminhtml\default\default\template\page\footer.phtm

You can find here head file, breadcrumbs file to change different static contant.