linux wireless wpa quick manual configure

setup-wifi.sh

#!/bin/bash

if [ $# -lt 3 ]
  then
    echo "usage: ./setup-wifi.sh INTERFACE ACCESS_POINT_SSID PASSPHRASE"
    echo "example: ./setup-wifi.sh wlan0 linksys supersecret"
    exit;
fi

wpa_passphrase $2 $3 > wifi.conf
wpa_supplicant -i$1 -cwifi.conf -Dwext -B
echo "configuring... waiting 10 seconds"
sleep 10
sudo dhclient $1