一个用了统计CPU 内存 硬盘 使用率的shell脚本

#!/bin/bash
#this script is use for describle cpu hard memery utilization
total=0
idle=0
system=0
user=0
nice=0
mem=0
vmexec=/usr/bin/vmstat
which sar > /dev/null 2>&1
if [ $? -ne 0 ]
then
  ver=`vmstat -v | awk '{printf $3}'`
  nice=0
  temp=`vmstat 1 3 |tail -1`
  user=`echo $temp |awk '{printf("%s\n",$13)}'`
  system=`echo $temp |awk '{printf("%s\n",$14)}'`
  idle=`echo $temp |awk '{printf("%s\n",$15)}'`
  total=`echo|awk '{print (c1+c2)}' c1=$system c2=$user`
fi
echo "#cpu utilization#"
echo "total cpu  is already use: $total"
echo "cpu user   is already use: $user"
echo "cpu system is already use: $system"
echo "cpu nice   is already use: $nice"
echo "cpu idle   is already use: $idle"
echo
root_use=$(df -lh | awk 'nr==2' | awk '{print $5}')
dev_use=$(df -lh | awk 'nr==3' | awk '{print $5}')
dev_shm_use=$(df -lh | awk 'nr==4' | awk '{print $5}')
echo "#hard utilization#"
echo "/        is already use: $root_use"
echo "/dev     is already use: $dev_use"
echo "/dev/shm is already use: $dev_shm_use"
echo
memery_used=$(free | awk 'nr==2' | awk '{print $3}')
memery_all=$(free | awk 'nr==2' | awk '{print $2}')
memery_percent=$(echo "scale=4;$memery_used / $memery_all" | bc)
percent_part1=$(echo $memery_percent | cut -c 2-3)
percent_part2=$(echo $memery_percent | cut -c 4-5)
echo "#memery utilization#"
echo "system memery is already use: $percent_part1.$percent_part2%"
swap_used=$(free | awk 'nr==4' | awk '{print $3}')
swap_all=$(free | awk 'nr==4' | awk '{print $2}')
swap_percent=$(echo "scale=4;$swap_used / $swap_all" | bc)
swap_part1=$(echo $swap_percent | cut -c 2-3)
swap_part2=$(echo $swap_percent | cut -c 4-5)
echo "swap   memery is already use: $swap_part1.$swap_part2%"
echo

在开发cfs过程中需要对机器实时的内存，cpu，硬盘使用率进行监控，因为cfs跑在linux机器上，可以利用linux中一些相应虚拟文件进行内存cpu使用率的计算，于是编写了以下脚本，很简单，但是很实用。

包含三个部分，分别为硬盘使用率，内存使用率和cpu使用率。

 #!/bin/sh

#count cpu_used_rate,memory_used_rate,disk_used_rate
#@jayson 2012-5

#disk_used_rate
#depend on real storage place the parameter 'location' need to alter.
#本人文件主要存储于sda8分区，所以以此提取。
location=/dev/sda8
disk_used_rate=$(df -h | grep $location | awk '{print $5}')
echo $disk_used_rate

#memory_used_rate
loadmemory=$(cat /proc/meminfo | awk '{print $2}')
total=$(echo $loadmemory | awk '{print $1}')
free1=$(echo $loadmemory | awk '{print $2}')
free2=$(echo $loadmemory | awk '{print $3}')
free3=$(echo $loadmemory | awk '{print $4}')

used=`expr $total - $free1 - $free2 - $free3`
used_rate=`expr  $used/$total*100 | bc -l`
memory_used_rate=`expr  $used_rate/1 | bc`
echo $memory_used_rate%

#cpu_used_rate
log1=$(cat /proc/stat | grep 'cpu ' | awk '{print $2" "$3" "$4" "$5" "$6" "$7" "$8}')
sys1=$(echo $log1 | awk '{print $4}')
total1=$(echo $log1 | awk '{print $1+$2+$3+$4+$5+$6+$7}')

sleep 0.5

log2=$(cat /proc/stat | grep 'cpu ' | awk '{print $2" "$3" "$4" "$5" "$6" "$7" "$8}')
sys2=$(echo $log2 | awk '{print $4}')
total2=$(echo $log2 | awk '{print $1+$2+$3+$4+$5+$6+$7}')

sys=`expr $sys2 - $sys1`

本文出自 “fighting,jayson!” 博客