Where do I get the checksum for elasticsearch download?

I'm running the elasticsearch cookbook and I'm seeing this: > No checksum was provided for https://download.elasticsearch.org/elasticsearch/release/org/elasticsearch/distribution/rpm/elasticsearch/2.3.5/elasticsearch-2.3.5.rpm, this may download a new package on every chef run!

Its downloading the package each time.

So looks like I have to specify download_checksum "Big-Long-Checksum" in my recipe.

Where do I find the checksum? I don't see it on the download page?

I'm using the latest 2.3.5, where do I go to find the checksum?

So I'm still confused about this. Is this a linux package manager thing or do I get the hash from elasticsearch?