#!/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 86400
done