#!/bin/bash

if [[ 'x' == "x$1" ]]
 then
   echo "Usage: $0 filenamestub"
   echo " for syslog.all, type $0 syslog.all"
   echo " aff files of the form name.###.gz will become name.yyyymmdd.gz"
   exit
 fi

file="$1"
if [[ ! -e ${file} ]]
 then
   echo "${file} does not exist!"
   exit
 fi

ls -l ${file}.* | awk '{print $9,$6,$7,$8}' | while read line
 do 
   set $line
   name="$1"
   dt="$2 $3 $4"
   dt1=$(date --date="${dt}" '+%Y%m%d')
   echo "mv $name ${file}.${dt1}.gz"
   mv $name ${file}.${dt1}.gz
done