Scripting CPU and memory usage

[TheJuiceman]

Hey gang,

Does anyone have a nice universal script (meaning no special software needed like glance, etc) that will give a nice quick summary of percentage of memory and CPU usage that can be emailed? Thanks.

[Mel Burslan]

top is available with any new system installation and command

$ top -n 1 | grep -e ^Cpu -e ^Mem

provides this output:

Cpu(s): 0.2% us, 0.7% sy, 0.0% ni, 98.6% id, 0.2% wa, 0.0% hi, 0.3% si
Mem: 1024248k total, 990548k used, 33700k free, 130372k buffers

which can be piped into your mail agent to send via email or can be further massaged with combination of awk/sed/cut commands to make the output you wish to see.

Hope this helps

[TheJuiceman]

I guess I'm looking for something a bit more than that. Something yielding a percentage used in a neat output like so...

CPU used: 23%
Memory used: 23%

[Vitaly Karasik_1]

Mel answered your question, I want just to suggest you to use some NMS (Zenoss, Ganglia, ...) for storing/analyzing historical data.

Getting email reports once per minute/hour/day seems me almost useless - you don't see any trends in this way.

[Mel Burslan · Accepted solution]

allrighty then..

#!/bin/bash

cpuidle=`top -n 1 | grep ^Cpu | cut -d"," -f4| cut -d"%" -f1|cut -d" " -f2`
cpuused=`echo 100-$cpuidle | bc`

memtotal=`top -n 1 | grep ^Mem |awk {'print $3'}|cut -d"k" -f1`
memused=`top -n 1 | grep ^Mem |awk {'print $5'}|cut -d"k" -f1`
mempct=`echo "(${memused}*100)/${memtotal}"| bc`

echo "CPU Used: ${cpuused}%"
echo "Memory Used: ${mempct}%")



If you putt all of the above in a script, run it and pipe it to your mailer, you will receive the desired output

[Mel Burslan]

Oh, I fatfingered and put an extra right paranthesis at the end of the last line of the script, which should not be there. Please remove it.

[TheJuiceman]

Mel...that is PERFECT!!!! Thank you so much for your help!!!