#!/bin/bash
# Change network configuration for raspberry pi
# in /etc/network/interfaces and /etc/resolv.conf
# on partition 2 (usually /dev/sdb)

# Must be in /etc/fstab:
# /dev/sdb2 /media/sdb2 ext4 noauto,users 0 0
DEVICE=/media/sdb2
NETWORK=10.0.0

mount "$DEVICE" || { echo "Kann SD-Karte mit Raspbian nicht mounten!"; exit 1; }

read -p "Nummer (1-25): " nr

echo "Ändere IP-Adresse in 10.0.0.$nr".

echo "auto lo
auto eth0

iface lo inet loopback
iface eth0 inet static
	address $NETWORK.$nr
	netmask 255.255.255.0
	broadcast $NETWORK.255
	gateway $NETWORK.254

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface default inet dhcp
" | sudo dd of=/media/sdb2/etc/network/interfaces 2>/dev/null

echo "nameserver 10.0.0.254" | sudo dd of=/media/sdb2/etc/resolv.conf 2>/dev/null

sleep 2

umount "$DEVICE"