The purpose of this small message is to show how you can configure a static IP address in Debian Linux. I know that other sites have more detailed explanations on this (and the man page too), but I put it here mostly as a reminder to myself.
Add the following content in
/etc/networking/interfaces to configure a static IP in Debian Linux:
iface eth0 inet static address 192.168.11.30 gateway 192.168.11.2 netmask 255.255.255.0 broadcast 192.168.11.255 network 192.168.11.0