#!/bin/bash

while true

do

        cd  /usr/local/tomcat/logs

        d=`date +%Y%m%d`

        d15=`date -d'15 day ago' +%Y%m%d`

        cp catalina.out /opt/logs/catalina.out.${d}

        echo " " > catalina.out

        rm -rf catalina.out.${d15}

        sleep

done