In order to configure Magento to work with a new domain or change its current directory, you should:

• Edit the Magento database.

Go to your cPanel > phpMyAdmin. Click on the Magento database from the menu on the left, find the table called core_config_data and click on it.

Click the Browse tab and edit the first two fields:

web/unsecure/base_url
web/secure/base_url

by clicking the pen icon in front of them. Replace your old domain name with your new one and click the Go button to save the change. 

• Clear the Magento cache.

  The Magento cache folder is located in your Magento installation directory > /var/cache. To clear the cache, delete the folder and create it again.