Clean Magento 2 cache via Admin Panel
In order to clean a cache in Magento 2 please go to Admin Panel > System > Cache Management.
Press the Flush Magento Cache button.
Once the cache has been flushed you will see the success message.
Clean Magento 2 cache via CLI
In order to clean Magento 2 cache via command line interface use one of these commands:
c:c is a synonym to cache: clean
c:f is a synonym to cache: flush