dnsmasq - Debian Wiki
https://wiki.debian.org/dnsmasqDnsmasq is a lightweight, easy to configure, DNS forwarder and DHCP server. It is designed to provide DNS and optionally, DHCP, to a small network. It can serve the names of local machines which are not in the global DNS.
Dnsmasq - Community Help Wiki
https://help.ubuntu.com/community/Dnsmasqdnsmasq can be configured by editing the file $ /etc/dnsmasq.conf Local DNS Cache A DNS server resolves human readable domain names into IP addresses. For example, when one requests ubuntu.com, the DNS server finds the IP address for ubuntu.com . One can run a DNS cache on a computer via the steps below.