to change the IP address via cli

cp /etc/network/interfaces /etc/network/interfaces.backup
nano /etc/network/interfaces

for dhcp:
auto eth0
iface eth0 inet dhcp


for static:
iface eth0 inet static
address 10.0.0.2
netmask 255.255.255.0
network 10.0.0.0
broadcast 10.0.0.255
gateway 10.0.0.1
dns-nameservers 4.2.2.2



ifdown eth0 && ifup eth0