Install and Update via Magento Marketplace Composer
We recommend you install the extension via composer. It is easy to install, update and maintain.
Install via Composer
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Log in to the Magento server (via SSH) as a user who has permission to write to the Magento file system 
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Navigate to the root Magento folder and execute the following command to update your composer.json file: composer require [composer_name]Replace [composer_name] with the Composer Name indicated at your Magento Marketplace account. Please check this guide to find the appropriate composer name of an extension/module from Magento Marketplace. When prompted, enter your Magento authentication keys. Your public key is your Username; your private key is your Password. To generate your Magento public and private keys please see here 
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Enable the extension, update the database, deploy content, and clean cache: php bin/magento module:enable Ulmod_ComponentName
 php bin/magento setup:upgradeYou can find the ComponentName in the extension’s registration.php file. php bin/magento setup:static-content:deploy- The bin/magento setup:static-content:deploy command deploy the default locale which is en_US, please add your additional locale there if you have more locales. eg. if you have additional en_GB nl_NL fr_FR locales, include them in the deploy command as follow: bin/magento setup:static-content:deploy en_US en_GB nl_NL fr_FR
 Empty the generated folder php bin/magento cache:clean
Update via Composer
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Log in to the Magento server (via SSH) as a user who has permission to write to the Magento file system 
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Navigate to the root Magento folder. To update a single extension, run the following command: composer update [composer_name]Replace [composer_name] with the Composer Name indicated at your Magento Marketplace account. To update all extensions, run the following command: composer update
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Update the database, deploy content, and clean cache: php bin/magento setup:upgrade
 php bin/magento setup:static-content:deploy
 php bin/magento cache:clean
Delete via Composer
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Log in to the Magento server (via SSH) as a user who has permission to write to the Magento file system 
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Navigate to the root Magento folder and run the following command: composer remove [composer_name]Replace [composer_name] with the Composer Name indicated at your Magento Marketplace account. 
