Hi as magento 2 is still in a development phase and there are continuous releases are comming.
So we must have update Magento 2 timely for being safe and updated with all the features.
Fortunately upgrading Magento 2 is really very starlight forward and easy to do
To upgrade Magenbto 2 we can use composer and below are the commads we need to
run to upgrade magento to our desired version.
In this i am upgrading to magento 2.0.2 and you can change the version according to your needs
composer require magento/product-community-edition 2.0.2 --no-update
composer update
rm -rf var/di var/generation
php bin/magento cache:clean
php bin/magento cache:flush
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento indexer:reindex
After upgrade, check your Magento version with the following command:
php bin/magento --version
