Emergency UNIX and Linux Support

export BUS_DATE=`cat path/parameterfilename.txt | grep 'P_BUS_DATE' | cut -d"=" -f2`
CURR_DY=`date "+%Y%m%d"`
CURR_DY_SECS=`date --date=$CURR_DY +"%s"`
BUS_DATE_SECS=`date --date=$BUS_DATE +"%s"`
#DAYS = $((($CURR_DY_SECS - $BUS_DATE_SECS) / 86400 ))
DAYS=$((($CURR_DY_SECS - $BUS_DATE_SECS) / 86400 ))
i=$DAYS
while [[ $i -ge 0 ]]
do
# mv /path/filename.$(expr $CURR_DY - $i).dat /iis_dev_data/wcc/cpmg/ctl/
# mv /path/filename.$(expr $CURR_DY -d "$i day" "+%Y%m%d").dat /destination/
# mv /path/filename.$($CURR_DY -d "-$i day" "+%Y%m%d").dat /destination/
# mv /path/filename.$[$CURR_DY -d "-$i day" "+%Y%m%d"].dat /destination/
mv /path/filename.$(expr $CURR_DY -d "-$i day" "+%Y%m%d").dat /destination/
#i=$ [ expr $i - 1 ]
i=$(($i - 1))
done

++ expr 20120606 -d '-9 day' +%Y%m%d
expr: syntax error
+ mv /iis_dev_data3/wcc/cpmg/tmp/filename..dat /iis_dev_data/wcc/cpmg/ctl/
mv: cannot stat `/iis_dev_data3/wcc/cpmg/tmp/filename..dat': No such file or directory
+ i=8
+ [[ 8 -ge 0 ]]
++ expr 20120606 -d '-8 day' +%Y%m%d
expr: syntax error
+ mv /iis_dev_data3/wcc/cpmg/tmp/filename..dat /iis_dev_data/wcc/cpmg/ctl/
mv: cannot stat `/iis_dev_data3/wcc/cpmg/tmp/filename..dat': No such file or directory

#!/bin/bash

DAYSBACK=7
WORKINGDIR="/tmp"
TARGETDIR="/tmp/mvd"
ACTION="cp" # change this to mv

for day in `seq 1 ${DAYSBACK}`
do
${ACTION} ${WORKINGDIR}/`date -d "${day} days ago" +%Y%m%d`.zip ${TARGETDIR}
done