Shell脚本监控Linux系统CPU使用率详解程序员

Shell脚本如下：

#/bin/bash 
#environment variable 
source /etc/profile 
#cpu 
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_sum=$(($cpu_us+$cpu_sy)) 
if(($cpu_sum >= 90)) 
        then 
        msg="TIME:$(date +%F_%T) 
                 HOSTNAME:$(hostname) 
                 IPADDR:$(ifconfig |awk 'NR==2{print $2}') 
                 MSG:CPU使用率过高！已经用了${cpu_sum}%" 
            echo $msg 
        vmstat | awk '{print $1,$13,$14,$15}' | sed -n '2,$p' > /test/tt.txt 
        /test/sendmail.py $msg 
fi