原！linux脚本统计

#! /bin/sh
first=$
first2=$
input2=$

let second=`date -d "-1 days ago ${input2}" +%Y%m%d`

second2=$second

arr=(   )

length=${#arr[@]};

echo "length= ${length}"

let length=$length-

 for i in $(seq  ${length}); do

sum1=
first=$first2

cmppid=${arr[$i]}
echo "cmppid =${cmppid},统计如下："

while [ "$first" != "$second" ]
do
statistics_num=`cat detail_"$first".txt |grep  -E ".*${cmppid}.*" | wc -l`
echo detail_"$first".txt  statistics_num="$statistics_num"
let sum1=$sum1+$statistics_num
let first=`date -d "-1 days ago ${first}" +%Y%m%d`
done  

echo "sum1=$sum1"

done