Ubuntu IP configuration

sudo vi /etc/network/interfaces

configure Automatic address for a specific network card

# The primary network interface use DHCP to find our address auto eth0 iface eth0 inet dhcp

configure Static IP address for your network card

#The primary network interface auto eth0 iface eth0 inet static address 192.168.1.7 gateway 192.168.1.1 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255

 configure the  preffered DNS

sudo vi /etc/resolv.conf

nameserver 192.168.1.10

sudo /etc/init.d/networking restart

 setup secondary IP address or virtual IP address in Ubuntu

sudo vi /etc/network/interfaces

auto eth0:1 iface eth0:1 inet static address 192.168.1.60 netmask 255.255.255.0 network x.x.x.x broadcast x.x.x.x gateway x.x.x.x

sudo /etc/init.d/networking restart