Using shell to monitor cpu, disk and memory utilization

Use shell to monitor cpu, disk and memory utilization, and email to notify when the alarm threshold is reached

And cooperate with the task plan, the alarm information can be obtained in time.

#! / bin/bash###Author: Liuzhengwei-1135960569@qq.com#QQ:1135960569#Last modified: 2017-04-19 21:50#Filename: jiankong.sh#Description: # # # obtain cpu utilization cpuUsage= `top-n 1 | awk-F'[%] +''NR==3 {print $2}' `# obtain disk utilization data_name= "/ dev/vda1" diskUsage= `df-h | grep $data_name | awk-F'[%] +'{print $5} '`logFile=/tmp/jiankong.log# obtain memory mem_total= `free-m | awk-F' [:] +'' NR==2 {print $2} '`mem_used= `free-m | awk-F' [:] + 'NR==3 {print $3}' `# Statistics memory usage mem_used_persent= `awk 'BEGIN {printf ".0f\ n" ('$mem_used'/'$mem_total') * 100}'`# get the alarm time now_time= `date'+% F% T'` function send_mail () {mail-s "monitoring alarm" 1135960569@qq.com

< /tmp/jiankong.log}function check(){ if [[ "$cpuUsage" >

80]] | | [["$diskUsage" > 80]] | | [["$mem_used_persent" > 80]] Then echo "alarm time: ${now_time}" > $logFile echo "CPU utilization: ${cpuUsage}%-- > disk utilization: ${diskUsage}%-- > memory utilization: ${mem_used_persent}%" > $logFile send_mail fi} function main () {check} main