/media/sda-magnetic/david/Extern-Magnetic-2022-06-29/Extern01/Dokumente-2021-05-8/disk10-ab-2020-01-10/02-debian-pc2-work/informatik/bash-programming/bash/bash0004.sh

#!/bin/bash

typeset -i count=1

for s in $(ls "./img")
do
  mv "./img/"$s "./img/img"$count".png"
  count=$(( $count + 1 ))
done