自动删除7天前文件（需要自行修改）

#!/bin/bash
##############################
# The: CaiJiangFeng
# From: Baustem
# Date: 2013-07-03
# Use:
#    crontab -e
#    add: 01 05 * * * sh /yourpath/rmlog.sh
#
##############################

j_logpath=/opt/jboss-4.2.2.GA/server/default/log
l_logpath=/opt/sun/local/ds/logs
savelognub=7
blur_j_logname=server.log.20
blur_l_logname=access.20
bakhome=/home/ipanle/baustem/logbak
daytag=$bakhome/daytag
DATE=`date +%Y%m%d`
[ -d $bakhome ] || mkdir -p $bakhome

dellog () {
path=$1
name=$2
days=$3
for logfile in `ls $path/$name*`
    do
        logtime=`stat $logfile -c %Y`
        nowtime=`date +%s`
        ndaystime=$(($nowtime - 36000 * $days))

        if [ $ndaystime -gt $logtime ];then
            rm -fr $logfile;
        fi
done
}

baklog () {
        mkdir -p $bakhome/$DATE
        cd $j_logpath
        mv $blur_j_logname* $bakhome/$DATE
        cd $l_logpath
        mv $blur_l_logname* $bakhome/$DATE
    for bak in $(ls -l $bakhome|grep ^d|awk '{print $8}')
        do
        if [ $bak -ne $DATE ];then
            rm -fr $bakhome/$bak
        fi
    done
}

#OK
if [ -f $daytag ];then
    agoday=`cat $daytag`
    if [ -z $agoday ];then
        echo $DATE > $daytag
        exit 100
    fi
    mvdays=$(($(date +%Y%m%d) - $agoday))
fi

if [ $mvdays -ge 2 ];then
    if [ $? -eq 0 ];then
        dellog $j_logpath $blur_j_logname $savelognub
        echo "`date` del ok." >> $bakhome/baustem.log
    fi
    disksize=`df -m|sed -n '3'p|awk '{print $3}'`
    if [ $disksize -le 300 ];then
            baklog;
            echo "`date` bak ok." >> $bakhome/baustem.log
        echo $DATE > $daytag
    fi
else
        echo "`date` skip." >> $bakhome/baustem.log
fi