====== Ubuntu - Networking - Configuration - Virtual Network Interfaces - Configure Permanent Virtual Network Interface ======

===== For a Static IP =====

Edit /etc/network/interfaces:

<file bash /etc/network/interfaces>
iface eth0:0 inet static
address 123.123.123.123
netmask 255.0.0.0
broadcast 123.255.255.255
</file>

----

===== For a Dynamic IP =====

Edit /etc/network/interfaces:

<file bash /etc/network/interfaces>
iface eth0:0 inet dhcp
</file>