/media/sda-magnetic/david/Dok-15-2023-11-27/fernuni-hagen/cs-i-ii/old-cs-2-03/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