UNIX for Dummies Questions & Answers

#! /usr/bin/bash

cnt=1
for myfile in `ls *.txt`
   do
   cntt=$(printf "%.3d" $cnt)
   myfilem=$(echo $myfile | cut -d"." -f1)
   echo $cntt $myfile $myfilem
   cp $myfile $myfilem"."$cntt
   cnt=$((cnt+1))
done

# ls -1 *.txt
abc.txt
def.txt
ghi.txt

# filerenamer.py -s "txt" -e "001:999" -l -n "*.txt"
==>>>>  [ /home/abc.txt ]==>[ /home/abc.001 ]
==>>>>  [ /home/def.txt ]==>[ /home/def.002 ]
==>>>>  [ /home/ghi.txt ]==>[ /home/ghi.003 ]

# filerenamer.py -s "txt" -e "001:999" -n "*.txt"  #remove -l to commit
/home/abc.txt  is renamed to  /home/abc.001
/home/def.txt  is renamed to  /home/def.002
/home/ghi.txt  is renamed to  /home/ghi.003

# ls -1
abc.001
def.002
ghi.003