Переименование файлов и нумерация

cat ~/bin/batchrename
#!/bin/sh
# this script wrote by Eddy 
#
#		batchrename - renames files like 01.ext, 02.ext ...
#
# Создан 17-го Июля 2003 года в 20:35
#   
#   format :  batchrename <list of files>
#        or:              -r <extension> <<list of files> or <dir>>
#   -r - recoursively
counter=0
extrec=""
if [ "$#" -lt "1" ]; then
    echo -e "\n\t\tUsage:\n\tbatchrename [opt]\nopt:"
    echo -e "-r <ext> <folder> (or file list) -- renames recoursively ALL files"
    echo -e "\tin folder <folder> (or by file list given)  with extension .<ext>"
    echo -e "<folder> -- renames ALL files in folder given"
    echo -e "<file list> -- renames ALL files of given filelist.\n\n"
    exit 0
fi
Name="$*"
if [ "$1" = "-r" ]; then
    extrec="$2"
    shift
    shift
    Name="$*"
    [ "$Name" = "" ] && Name="./"
fi
echo -e "\n\t\t\tRENAMING"

del_dup

for file in $Name
do
file=`echo "$file" | sed "s/<>/ /g"`
    if [ -d "$file" ];then
	echo -e "\nDiving into \033[38m $file \033[39m"
	cd "$file"
	if [ "$extrec" != "" ]; then
	    batchrename -r $extrec `ls -1 | sed "s/\ /<>/g"`
	else
	    batchrename `ls -1 | sed "s/\ /<>/g"`	
	fi
	cd ../
	continue
    fi
    ext=`ext "$file"`
    if [ "$ext" = "ion" ]; then
	continue
    fi
    if [ "$extrec" = "" -o "$ext" = "$extrec" ];then
        counter=`expr $counter + 1`
	echo -e "Progress: $counter files\r\c"
        mv "$file" "rnmd$counter.$ext"
    fi
done
echo -e "\n\n\t\t\tENDING"
digits=`echo $counter|awk '{print length ($0)}'`
cnt=1
while [ $digits -gt $cnt ]
do
    f=`ls -S -1|grep "rnmd[0-9]\{$cnt\}\."`
    rename rnmd rnmd0 $f
    cnt=`expr $cnt + 1`
done
if [ "$counter" -gt "0" ]; then
    rename rnmd "" rnmd*
fi
echo -e "\n\t\t\tDone !!!\n"

mkdir tmp && cd tmp
for i in a b c d; do touch file.b$i; done
n=0; for i in *; do let n=n+1; mv $i $(echo $i | sed -e "s/\./$n\./"); done

ls -1 file.b* | awk -F . 'BEGIN { i = 1 } { print("mv", $1"."$2, $1i"."$2) ; i++ }' | sh

rename 'our $i; $i++; s/\./$i\./' *

ls -1 file.b* | awk -F . '{ print("mv", $1"."$2, $1NR"."$2) }' | sh

ls -1 | grep 'file.b*' | awk '{print  $0 " file"NR$0}' | sed -e 's/file\./\./g; s/^/file/g' | xargs -L1 mv

`-1'
`--format=single-column'
     List one file per line.  This is the default for `ls' when standard
     output is not a terminal.