shell监控之列出1小时内cpu占用最多的10个进程

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 ",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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