自动删除文件脚本

!/bin/bash
dir="/home/face/capturepic/2017/"
Available=`df -k | sed -n ‘/sda3/p‘ | awk ‘{print int($5)}‘`
if [ $Available -gt 10 ];then
    echo "available less 10 "
    for mou in `ls $dir`
        do
            tmou=date +%m
            if [ $mou -lt $tmou ];then
                echo "delete dir $dir$mou "
                rm -rf $dir$mou
            elif [ $mou -eq $tmou ];then
                for day in `ls $dir$mou/`
                    do
                        today=date +%d
                        if [ $day -ne $today ];then
                            echo "delete dir $dir$tmou/$day "
                            rm -rf $dir$tmou/$day
                        fi
                    done
            fi
        done
fi

* * * * * ./test.sh