#!/bin/bash

set -x

YESTERDAY_DATE()
{
        date '+%d %m %Y' |
        {
                read DAY MONTH YEAR
                DAY=`expr "$DAY" - 1 + 100 | cut -c2-3`
                case "$DAY" in
                        0)
                                MONTH=`expr "$MONTH" - 1`
                                case "$MONTH" in
                                        0)
                                                MONTH=12
                                                YEAR=`expr "$YEAR" -1`
                                                ;;
                                esac
                        DAY=`cal $MONTH $YEAR | grep . | fmt -1 | tail -1`
                esac

                vardt=$?
                if [ $vardt -ne 0 ];then
                        echo "ERROR DURING SPOOLING PREVIOUS DAY DATE."
                        exit 1
                fi

                YDATE=${MONTH}${DAY}${YEAR}
        }
}


YESTERDAY_DATE

echo $YDATE

echo ${YDATE}

ls -lrt ${PATH}/out/demon.${YDATE}

+ YESTERDAY_DATE
+ date '+%d %m %Y'
+ read DAY MONTH YEAR
++ expr 28 - 1 + 100
++ cut -c2-3
+ DAY=27
+ case "$DAY" in
+ vardt=0
+ '[' 0 -ne 0 ']'
+ YDATE=08272017
+ echo

+ echo

+ ls -lrt /opt/test/user/atsuser.NHU/out/demon.
ls: cannot access /opt/test/user/atsuser.NHU/out/demon.: No such file or directory