Find the correct Cassandra.yaml file - cassandra

I am new to Cassandra, I am having issue with identifying the exact cassandra.yaml file as my search on linux shows 3 different files in different location. Can anyone please tell me how to locate the correct 'cassandra.yaml' file used by my running Cassandra.

Welcome to Cassandra's db!
The cassandra.yaml's file is (normally) in /etc/cassandra/conf .
You can see in the picture below:

On my ubuntu 20.04 release, cassandra.yaml is found at /etc/cassandra/cassandra.yaml

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