shell script 문의~

분석 좀 부탁드립니다.

로그 삭제 스크립트 인데 실행시키면 어느정도의 로그가 삭제 되는지..

i=0

used=$(df $ARCH_DEST | grep / | awk '{print $4}'|cut -f 1, -d "%")

if [ $used -gt 70 ]
then
        while [ $used -ge 70 ]
        do
                del_file=`ls -rlt $ARCH_DEST | grep .arc | awk '{if(NR==1) print $9}'`
                if [ x$del_file != x"" ]
                then
                        rm -f $ARCH_DEST/$del_file
                        used=`(df $ARCH_DEST | grep / | awk '{print $4}' | cut -f 1, -d "%")`
                else
                        exit 0
               fi

                let "i = $i + 1"
                if [ $i -gt 100 ]
                then
                       exit 0
                fi
        done
fi