A standard network interface will look similar to the following in /etc/network/interfaces: auto eth0 iface eth0 inet static address 192.168.210.100 netmask 255.255.255.0 broadcast 192.168.210.255 gateway 192.168.210.1 Adding more IP addresses to those interfaces is as simple as creating an alias, done by duplicating the information for the initial interface and appending a colon followed by 0,1,2,3,etc according to how many aliases are needed, minus the gateway (the initial IPs gateway will be used): auto eth0:0 iface eth0:0 inet static address 192.168.210.101 netmask 255.255.255.0 broadcast 192.168.210.255 auto eth0:1 iface eth0:1 inet static address 192.168.210.102 netmask 255.255.255.0 broadcast 192.168.210.255 When finished, run an ifconfig to verify that the new interfaces are up…