How to Update Magento 2 (composer way)
Magento 2 offers possibility to update it’s self through Magento backend panel or trough composer (described here).
First of all check if the cache is enabled:
php bin/magento cache:status
Clear Cache in Magento 2
The cache is the biggest issue when you develop so you need to know all the possible ways of cleaning it.
There are 3 way to clean the cache (similar to Magento 1): Read more “Clear Cache in Magento 2”