How to Set a static IP address in Backtrack 4

/etc/init.d/networking start

Next, set the static IP address:

ifconfig eth0 10.1.1.69 netmask 255.255.255.0 up

Next, set the default gateway:

route add default gw 10.1.1.1

Finally, set DNS servers and search suffixes:

nano /etc/resolv.conf

Add the following lines for your environment:

domain internaldomain.local search internaldomain.local nameserver 10.1.1.21 nameserver 10.1.1.21

Now you should have network connectivity with your desired static IP address in BackTrack 4.