https://stackoverflow.com/questions/28350783/how-to-replace-the-sku-number-for-5000-products-in-magento
php updateSkus.php –filename skus.csv
https://stackoverflow.com/questions/28350783/how-to-replace-the-sku-number-for-5000-products-in-magento
php updateSkus.php –filename skus.csv