okbox/install_hotspot.sh

#!/bin/bash
# Based on Adafruit Learning Technologies Onion Pi project
# But mainly fixed by Raspberry Pi FR...

if (( $EUID != 0 )); then
   echo "This must be run as root. Try 'sudo bash $0'." 
   exit 1
fi
apt-get update -y
apt install dnsmasq -y
systemctl stop dnsmasq

echo "interface wlan0
    static ip_address=192.0.4.1/24
    nohook wpa_supplicant" >> /etc/dhcpcd.conf

service dhcpcd restart
mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig
echo "interface=wlan0      # Use the require wireless interface - usually wlan0
dhcp-range=192.0.4.2,192.0.4.22,255.255.255.0,24h" > /etc/dnsmasq.conf

systemctl unmask dnsmasq
systemctl enable dnsmasq
systemctl restart dnsmasq

if command -v rfkill &> /dev/null
then
    rfkill unblock wlan
fi

apt-get install hostapd -y
systemctl unmask hostapd
systemctl enable hostapd

ssid=Pyrale
passphrase=Paypoo2016

echo "interface=wlan0
driver=nl80211
ssid=$ssid
hw_mode=g
channel=7
wmm_enabled=0
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=$passphrase
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
" > /etc/hostapd/hostapd.conf

echo 'DAEMON_CONF="/etc/hostapd/hostapd.conf"' >> /etc/default/hostapd
systemctl start hostapd
cp /etc/sysctl.conf /etc/sysctl.bak
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
echo "up iptables-restore < /etc/iptables.ipv4.nat" >> /etc/network/interfaces
sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT
sh -c "iptables-save > /etc/iptables.ipv4.nat"
sed -i '/exit 0/ i iptables-restore < /etc/iptables.ipv4.nat' /etc/rc.local
exit 0