Rename current files

rename.sh

#! /usr/bin/env bash

arg1=$1
arg2=$2
arg3=$3

FILTER=${arg1:-*}
PREFIX=${arg2:-n}
SUFFIX=${arg3:-.n}

ARR=($(seq -f %03g 10000))
index=0
for name in $FILTER
do
  mv "${name}" "${PREFIX}${ARR[${index}]}${SUFFIX}";
 ((index++))
done

unset ARR
unset index