#!/usr/bin/env bash
echo "Shell-Skript wlansignal (AHG, 2016), Abbruch mit Ctrl-C"
echo -e "ESSID: `iw dev wlan0 link | 
sed -n '2 p' | awk '{print $2}'`, \c"
echo -e "Frequenz: `iw dev wlan0 link | 
sed -n '3 p' | awk '{print $2}'` MHz, \c"
echo "Signalstärke (dBm):"
while true
do
    echo -e "\r`iw dev wlan0 link | sed -n '6 p' | awk '{print $2}'` \c"
done