You can retrieve named.ca file by issuing the following command dig @a.root-servers.net . ns > named.ca or download from this location : ftp://ftp.internic.net/domain/named.root

Here is a little tutorial on how to configure bind in chrooted environment. 1. First of all you need to install all the required packages. #yum install bind bind-chroot bind-libs bind-utils caching-nameserver 2. Configure RNDC.key file. This key file is required for secured communication between master and slave DNS