Say on our host
alpha
we want to change (from DHCP) to a static IP Address
192.168.127.123
edit
/etc/hosts
and add an entry for alpha with 192.168.127.123 as:
192.168.127.123 alpha
edit
/etc/network/interfaces
and make it look like this:
auto lo iface lo inet loopback auto eth0 allow-hotplug eth0
comment the following line referring to DHCP
#iface eth0 inet dhcp
add the following for a static IP Address
iface eth0 inet static
change as necessary to an address /netmask from your network
address 192.168.127.123 netmask 255.255.255.0
change as necessary to the gateway of your network
gateway 192.168.127.1
change as necessary to match the DNS server of your network
dns-nameservers 192.168.127.1
Lastly, in a terminal, run
sudo service networking stop sudo service networking start