#!/bin/bash
awk 'BEGIN {file = "/proc/stat";while (a==a) {getline < file;u=$2-up;s=$3-sp;n=$4-np;i=$5-ip;printf ("%2.1f\n"),(u+s)/(u+s+n+i)*100;up=$2;sp=$3;np=$4;ip=$5;close(file);system("sleep 1")}}'