How to use Hashcat for Keepass 2?

Question

KeePass

I forgot part of the password to the KeePass 2 database (*.kdbx), I'm trying to guess using Hashcat 5.1. I have not come across the program before, tell me how to form a mask to search for the rest of the password.
I can't remember the ending. The password looks like:
Known_partxxxxxx

Answer 1

Here in the second post there are recommendations on this topic.
https://hashcat.net/forum/thread-858.html