Shell Programming and Scripting

minute hour * 3,6,9,12 0 command_string

[ $(date +%e) -gt 7 ] && exit 0

#!/bin/sh
set -vx

Echo "Checking whether it is first sunday of the month"

Date=` date +%e `
Date_From_Calendar=` cal | awk 'NF==7 && !/^Su/{print $1;exit}' ` ---- This variable will store the first sundays date of the month.

if [[ $Date_From_Calendar-le 7 ]];
then 
echo "Triggering the Script"

sh pathname/Script.sh

else

echo "The Date is greater than 7 hence the script will not execute."
fi

DATE=`date +%d`
DATE_VAL=`cal | awk '(NR==3 && NF==7){print $1} (NR==3 && NF<7){getline;print $1}'`
if [[ $DATE != $DATE_VAL ]]
then
       ./script.ksh  #### You could call script here or mention the commands here too.
else
       exit;
fi

MONTH=`date +%m`
DATE_VAL=`cal | awk 'NR>2 && NF==7{A[++i]=$1} NR>2 && NF<7{A[++i]=0} END{print A[1]}'`
DATE=`date +%d`
if [[ $MONTH==3 || $MONTH==6 || $MONTH==9 || $MONTH==12 ]]
then
        if [[ $DATE == $DATE_VAL ]]
        then
                echo run script
        else
                exit;
        fi
else
        exit;
fi