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