要求如下：
请使用vmstat采集间隔1秒连续60秒得数据，汇总各项数据的平均值，一并形成一个报告。


答案：#! /bin/bash

## for vmstat 1 60 and get the average number.
## Writern by Aming.

comm="/usr/bin/vmstat"
f1="/tmp/1.txt"
f2="/tmp/2.txt"
f3="/tmp/3.txt"

$comm 1 60 >$f1
tail -n 60 $f1 >$f2
n=`awk '{print NF}' $f2 |head -n1`
echo "">$f3
for i in `seq 1 $n`; do
        awk 'BEGIN {a=0}; {a=a+$"'$i'"};END{print a/NR}' $f2 >> $f3
done

cat $f1
echo "the average number is:"
echo "-----------------------------------------------------------------------------------"
cat $f3|xargs