脚本内容如下：
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#!/bin/sh
#定义变量
secs=3600
unit_time=60
stepts=$(( $secs / $unit_time ))
echo CPU usage...;
for((i=0;i<stepts;i++))
do
ps -eo comm,pcpu | tail -n +2 >> /tmp/cpu_usage.$$ #$$表示当前进程pid信息
sleep $unit_time
done
echo CPU eaters:
cat /tmp/cpu_usage.$$ | \
awk '{process[$1]+=$2}END{for(i in process){printf("%-20s %s\n",i,process[i])}}' | \ #使用awk对收集结果进行统计分析
sort -nrk 2 | head
rm -f /tmp/cpu_usage.$$
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