In order to configure Magento to work with a new domain, you should:
- Edit the Magento database.
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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.
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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.
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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.