gistfile1.sh

#!/bin/bash

url[0]="ftp://ftp5.gwdg.de/pub/linux/debian/debian/dists/wheezy/main/binary-i386/Packages.gz";
url[1]="http://debian.morphium.info/debian/dists/wheezy/main/binary-i386/Packages.gz";
url[2]="ftp://ftp.debian.com/debian/dists/wheezy/main/binary-i386/Packages.gz";

kn="12345"   # hier die Kundennummer eintragen   
tn=""        # und hier die Telefon Nummer
sleeptime=600

echo "
set datafile separator \"\t\";\
set timefmt \"%Y-%m-%d %H:%M:%S\";
set xdata time;
set format x \"%d.%m\\n%H:%M:%S\";
set output \"out.png\";
set terminal png size 1024,800;
set key bmargin font \",8\";
set ylabel \"Download Speed [MB/s]\"
set title \"Kundennummer: $kn / Rufnummer $tn\\nDownload Bandbreitenmessung\"
set datafile missing \"\";
" > p.gnuplot 

echo -n "plot "  >> p.gnuplot 
for (( i=0;i<${#url[@]};i++))
	do 
        echo -n "\"speed-log.csv\" using 1:(\$$(($i+2))) ti \"${url[$i]}\"" >> p.gnuplot
        if (( $i<${#url[@]}-1 )); then echo ",\\" >> p.gnuplot ; fi
        done
        
echo >>p.gnuplot                                                                         

while [ true ];
	do
	for (( n=0;n<${#url[@]};n++))
		do
		for (( i=0;i<${#a[@]};i++))
			do 
				s[$i]="";
			done

		echo Check N: $n ${url[$n]}

		a=(`LC_ALL=C wget -4 -O /dev/null ${url[$n]}  2>&1 | tail -n2`)

		date=`echo ${a[0]} ${a[1]}`
		speed=`echo ${a[2]:1}`
		unit=`echo ${a[3]:0:4}`
		#  double bibyte = 1000.0; // wget.. src/retr.c
		if [ "$unit" == "KB/s" ];
			then 
				speedx=`echo "scale=2; $speed * 1000"| bc`;
			elif [ "$unit" == "MB/s" ];
				then 
					speedx=`echo "scale=2; $speed * 1000000" | bc`;
				fi
	
		s[$n]=`echo "scale=2; $speedx / 1000000"| bc`;

		echo -e -n "$date"  >>  speed-log.csv
		for (( i=0;i<${#url[@]};i++))
			do
			echo -e -n "\t${s[$i]}" >>  speed-log.csv
			done 
		echo ""	 >>  speed-log.csv
		done
	gnuplot p.gnuplot
	sleep $sleeptime
	done