How to set up or adding alias to network interface in Ubuntu

Edit /etc/network/interfaces:

# vi /etc/network/interfaces

Append text below:

auto eth0:1
iface eth0:1 inet static
address 192.168.1.7
netmask 255.255.255.0
broadcast 192.168.1.255
network 192.168.1.0

Restart networking:

# /etc/init.d/networking restart