Linux and Unix DNS Configuration
From SambaWiki
Introduction
The following describes how to configure Linux clients to use DNS servers. If you provide DNS server addresses via DHCP to your clients, configure your DHCP server to ship the address/es of your DNS server/s instead. For static configuration, continue reading.
General configuration (/etc/resolv.conf)
Edit your /etc/resolv.conf and add a „nameserver“ entry for each DNS server and your search domain:
nameserver 192.168.1.1 nameserver 192.168.1.2 search samdom.example.com