#!/bin/bash vigie_prefix="Car721035-2021-Pass0-Z2" device_prefix="-AudioMoth-247AA5015FDF286B-" prefix="$vigie_prefix$device_prefix" echo "Adding $prefix" extensions=('WAV', 'wav') n=`ls | wc -l` i=1 for extension in "${extensions[@]}" do for item in `ls *.$extension` do echo "($i/$n) Renaming $item" echo "mv $item $prefix$item" $(mv "$item" "$prefix$item") i=$((i+1)) done done