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#!/bin/bash

# Copyright (C) 2017 by Mike Gabriel <mike.gabriel@it-zukunft-schule.de>

# This script is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This script is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

WIFIDEV=${WIFIDEV:-wlan0}

apt-get install --download -y network-manager
apt-get install --download -y resolvconf

# rm /etc/resolv.conf

export DEBIAN_FRONTEND=noninteractive
apt-get install -q -y --force-yes resolvconf network-manager

systemctl stop systemd-networkd.service
systemctl stop systemd-resolved.service
systemctl disable wpa_supplicant@$WIFIDEV.service
systemctl disable systemd-networkd.service
systemctl disable systemd-resolved.service

systemctl daemon-reload

rm /etc/systemd/system/wpa_supplicant@.service
rm /etc/wpa_supplicant/wpa_supplicant-$WIFIDEV.conf

rm /etc/systemd/network/20-dhcp.network
rm /etc/systemd/network/21-dhcp-wireless.network

systemctl enable wpa_supplicant.service
systemctl enable networking
systemctl enable NetworkManager
systemctl start networking
systemctl start NetworkManager

echo "Please reboot your system now."