Magento 2 - 2.1 to 2.3 update

Question

How can I do a version update of my Magento 2.1 version to Magento 2.3?

Answer 1

First check the php version PHP 7.1 or 7.2

1- Run command :-

composer require magento/product-community-edition=2.3.3 --no-update

2- Run the composer update

composer update

And finally composer update command is done so run the below commands :-

rm -rf var/di/* var/generation/* var/cache/* var/log/* var/page_cache/* var/session/* var/view_preprocessed/* pub/static/*
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy
php bin/magento cache:clean
php bin/magento cache:flush
php bin/magento indexer:reindex