1.1: Edit /etc/network/interfaces:
sudo nano /etc/network/interfaces
1.2: Change from dhcp to static:
- iface eth0 inet dhcp + iface eth0 inet static + address 10.10.10.1 + netmask 255.255.255.0 + gateway 10.10.10.10 + network 10.10.10.0 + broadcast 10.10.10.255
2: Make sure that the name server is specified in ‘/etc/resolv.conf’:
nameserver 10.10.10.10
3: Uninstall the dhcp-client (otherwise it will overwrite your changes on the next renew cycle!):
sudo apt-get remove dhcp3-client
4: Restart the network to use the new settings:
sudo /etc/init.d/networking restart
Done 
