Use below command to update MAGENTO 2 version from old version to latest version from root directory. I ended up trying to do the upgrade from the command line and it worked 1> composer require magento/product-community-edition 2.1.7 --no-update 2> composer update 3> php bin/magento setup:upgrade
find some magento simple technical solution easly get solution with wide explanation. how we can use the solution code. Here i am posting what i faced issues and found issues solving solution. Magento is most powerful eCommerce frame work. working in magento framwork finding soluiotn and sharing technical knowledge here.