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/etc/resolv.conf
http://www.linux.org/docs/ldp/howto/DNS-HOWTO.html
http://www.pcc-services.com/sles/dns3.html
dig @192.168.1.2 etslinked.etspowergroup.local dig @192.168.1.2 -x IPADDR
http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch18_:_Configuring_DNS#Introduction_to_DNS
ipconfig /displaydns ipconfig /flushdns