First, make a backup of the /etc/network/interfaces file.
cp /etc/network/interfaces /root/interfaces.bak
Edit the /etc/network/interfaces file.
Add a section for as many IP addresses as you are adding.
auto eth0:0 iface eth0:0 inet static address xx.xx.xx.xx netmask 255.255.255.0
Fill in the address with your new IP address.
Increment each new IP address interface by :1.
eth0:1 eth0:2 etc
When you are finished save the file. You can reboot the server for the new IP addresses to take effect, or issue the following command:
To verify your new settings, issue the following command.