Check and register crontab settings (just in case you are not allowed to add files under /etc/cron.d folder)

ControlCrontab.sh

#!/bin/bash
# usage:
# ControlCrontab.sh [check|register]

if [ `echo $USER` != "hogehoge" ]; then
    echo "you must be hogehoge!!!!"
    exit 0
fi

if [ $# -eq 1 ] && [ $1 = "check" ]; then
    crontab -l
    exit 0
fi

if [ $# -eq 1 ] && [ $1 = "register" ]; then
    HOSTNAME=`hostname;`
    CRONTABS="/opt/scripts/crontabs/${HOSTNAME}/*.crontab"
    if [[ "${HOSTNAME}" =~ ^SERVER-NAME-0[1-3] ]]; then
        diff <(crontab -l) <(cat ${CRONTABS})
        echo -n "you are now in ${HOSTNAME}. are you sure to update? type [y] if ok: "
        read ANSWER
        if [ ${ANSWER} = "y" ]; then
            DATETIME=`date +"%Y%m%d-%H%M%S";`
            BACKUPDIR="/opt/scripts/crontabs/${HOSTNAME}/backup/"
            crontab -l > ${BACKUPDIR}${DATETIME}.crontab.log
            cat ${CRONTABS} | awk "BEGIN{print \"# Registered at: ${DATETIME}\" } {print}" | crontab
            echo "successfully finished."
        else
            echo "operation is canceled."
        fi
    else
        echo "please move to other SERVER"
    fi
    exit 0
fi

echo " usage:"
echo " ControlCrontab.sh [check|register]"
exit 0