Shell脚本监控CPU、内存和硬盘利用率

转：http://blog.51cto.com/lizhenliang/1610415

1、监控CPU利用率（通过vmstat工具）　　

　　

#!/bin/bash
#====================================================
# Author: lizhenliang - EMail:[email protected]
# Create Date: 2015-02-01
# Description: cpu utilization monitor # blog:lizhenliang.blog.51cto.com #==================================================== if [ `uname` != "Linux" ];then echo "check os not linux." exit 1 fi which vmstat &>/dev/null if [ $? -ne 0 ];then echo "vmstat command no found, please install procps package." exit 1 fi ################################################## cpu_us=`vmstat | awk '{print $13}' | sed -n '$p'` cpu_sy=`vmstat | awk '{print $14}' | sed -n '$p'` cpu_id=`vmstat | awk '{print $15}' | sed -n '$p'` cpu_wa=`vmstat | awk '{print $16}' | sed -n '$p'` #等待I/0完成 cpu_sum=$(($cpu_us+$cpu_sy)) cpu_info() { echo "CPU_Sum : $cpu_sum% ( CPU_Use:${cpu_us}% , CPU_System:${cpu_sy}% )" echo "CPU_Idle : ${cpu_id}%" echo "CPU_Wait : ${cpu_wa}" } #cpu_info; if [ $cpu_sum -ge 90 ];then echo "CPU utilization $cpu_sum." | mail -s "CPU Monitor" [email protected]
 fi

2、监控内存利用率

#!/bin/bash
#====================================================
# Author: lizhenliang - EMail:[email protected]
# Create Date: 2015-02-01
# Description: memory utilization monitor # blog:lizhenliang.blog.51cto.com #==================================================== which bc &>/dev/null if [ $? -ne 0 ];then echo "bc command no found, Please install bc package." exit 1 fi Date=`date +%F" "%H:%M` IP=`ifconfig eth0 | awk '/inet addr/ {print $2}' | cut -d: -f2` Total=`free -m | grep Mem | awk '{print $2}'` Use=`free -m | awk '/buffers\// {print $NF}'` Free=$(($Total-$Use)) Total_conv=`echo "scale=2;$Total/1024" | bc | awk '{print $1"G"}'` #通过bc计算，保留小数点后两位（scale） if [ $Free -lt 200 ];then Content=`echo -e "Date : $Date \nHost : $IP \nTotal : ${Total_conv} \nUse : ${Use}M \nFree : ${Free}M"` echo "$Content" | mail -s "Memory Monitor" [email protected] fi

 

3、监控磁盘利用率

#!/bin/bash
#====================================================
# Author: lizhenliang - EMail:[email protected]
# Create Date: 2015-02-01
# Description: disk utilization monitor # blog:lizhenliang.blog.51cto.com #==================================================== Date=`date +%F" "%H:%M` IP=`ifconfig eth0 | awk '/inet addr/ {print $2}' | cut -d: -f2` Total=`fdisk -l | grep "Disk /dev/sd[a-z]" |awk '{print $2$3"GB"}' |sed 's/:/=/' |xargs echo -n |sed 's/[ ]/,/g'` #去掉换行符，并以逗号分隔在邮件显示总每个分区大小 Disk_Use=`df -h |awk '{print $1"="$5}' | sed '1d' | sed 's/%//g'` for i in $Disk_Use do A=`echo $i |awk -F'=' '{print $2}'` if [ $A -gt 8 ];then echo -e "Date : $Date \nHost : $IP \nTotal : $Total \nProblem : Part Use ${i}%" | mail -s "Disk Mo nitor" [email protected] fi done