To set static IP address on debian (or derivative distros) is straight forward. A workstation don't necessarily need to use static addresses, but it's unavoidable on a server.
The file that needs to be changed is located in /etc/network/ and is called interfaces
This is what the section on eth0 should look like:
# The primary network interface allow-hotplug eth0 iface eth0 inet static address 192.168.1.14 netmask 255.255.255.0 gateway 192.168.1.1 nameserver 192.168.1.2 192.168.1.3
And for setting a virtual address on the same interface add the following
# virtual IPs auto eth0:1 iface eth0:1 inet static address 192.168.1.13 netmask 255.255.255.0
Simple enough, right? :)