Work on Ubuntu 13.04, Raspberry Pi Ref: www.pi-point.co.uk/documentation/

hostapd-dn.bash

#ifconfig wlan0 192.168.1.1
cp /etc/dnsmasq.conf.bk /etc/dnsmasq.conf
#echo "interface=wlan0" > /etc/dnsmasq.conf
#echo "dhcp-range=192.168.1.5,192.168.1.254,255.255.255.0,12h" >> /etc/dnsmasq.conf

/etc/init.d/dnsmasq restart

rm hostapd.conf
#echo "interface=wlan0
#driver=nl80211
#ssid=xps-ubinix
#channel=1" > hostapd.conf

echo 0 > /proc/sys/net/ipv4/ip_forward

#iptables -t nat -A POSTROUTING -j MASQUERADE

killall hostapd

hostapd-up.bash

cp /etc/dnsmasq.conf /etc/dnsmasq.conf.bk
echo "interface=wlan0" > /etc/dnsmasq.conf
echo "dhcp-range=192.168.1.5,192.168.1.254,255.255.255.0,12h" >> /etc/dnsmasq.conf

/etc/init.d/dnsmasq restart

echo "interface=wlan0
driver=nl80211
ssid=xps-ubinix2
hw_mode=g
channel=6
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=1234567890
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP" > hostapd.conf

#echo "interface=wlan0
#driver=nl80211
#ssid=xps-ubinix
#channel=1" > hostapd.conf

echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -t nat -A POSTROUTING -j MASQUERADE

hostapd -B ./hostapd.conf

ifconfig wlan0 192.168.1.1

z-packages.bash

#http://raspberry-at-home.com/installing-3g-modem/
wget http://raspberry-at-home.com/files/sakis3g.tar.gz
sudo apt-get install hostapd hostapd-utils dnsmasq