Setup DHCP network
Edit /etc/network/interface
auto eth0
iface eth0 inet dhcp
Setup Static IP
Edit /etc/network/interface
auto eth0
iface eth0 inet static
address 192.168.1.104
netmask 255.255.255.0
gateway 192.168.1.1
Setup DNS
Edit /etc/resolv.conf
search
nameserver 192.168.1.1