[chef] Where is the storage of cooknooks in Chef Server 10?

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I am aware that you can check the existing cookbooks in the server using the 
# knife cookbook list

However, I want to check the exact location of the cookbooks in the server ,
say using the
# ls command.

But, I think the cookbooks are stored in the database which in my case is
CouchDB. Is there a way to check it directly?