Install libnet-dns-resolver-programmable-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libnet-dns-resolver-programmable-perl
programmable DNS resolver class for offline emulation of DNS
Net::DNS::Resolver::Programmable is a Net::DNS::Resolver descendant class that allows a virtual DNS to be emulated instead of querying the real DNS. A set of static DNS records may be supplied, or arbitrary code may be specified as a means for retrieving DNS records, or even generating them on the fly.