Magento 2.1.x Notice: Magento 2.1.18 is the final 2.1.x release. After June 2019, Magento 2.1.x will no longer receive security patches, quality fixes, or documentation updates. To maintain your site's performance, security, and PCIPayment Card Industry: Refers to debit and credit cards and their associated businesses. compliance, upgrade to the latest version of Magento. The Magento User Guide 2.1.x remains available in PDF for Open Source and Commerce.
Important: Always flush the cache after installing or upgrading Magento, or any extensions and modules.
Component Manager lists each component that is currently installed, and can be used to synchronize any extensions you have purchased from Magento Marketplace with your system.
The System Upgrade tool can be used to upgrade your installation of Magento. During the process, it checks your system for readiness, creates a backup, and then upgrades your system.
The System Config tool uses the public and private keys from your Marketplace account to synchronize web setup operations.