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Simple Bash script error "integer expression expected" ?

Hi,

I would like to request an assistant.

I have deloped a simple bash script as attached.

It seems upon running it, i received the following error :

root@svr17 [/]# ./processcpu.sh
./processcpu.sh: line 6: [: 0.61: integer expression expected

Appreciates anybody assistant.

Thank you.

#!/bin/bash

host=`hostname`

OVERLOAD=`cat /proc/loadavg|awk '{ print $1 }'|sed 's/^[ \t]*//;s/[ \t]*$//'`
if [ "$OVERLOAD" -gt "1" ];
then
echo 'OVERLOAD ! - '$host' is overload and will down within a few minutes..

Monitor the server immediately..

PLEASE CHECK NOW !!

Date :'`date` | mail -s "SERVER OVERLOAD: '$host' having CPU LOAD '$OVERLOAD'" email@email.com
exit 1
fi

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ASKER CERTIFIED SOLUTION

ozo

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Shamsul Kamal

ASKER

the command cat /proc/loadavg|awk '{ print $1 }'| sed 's/^[ \t]*//;s/[ \t]*$//;s/\..*//' produce out put only "0" and not decimals.

ozo

the decimal part is what causes the error

Shamsul Kamal

ASKER

Thanks ozo ...

do you know any workaround for this ?

Tintin

I assume checking for a load average > 1 was just for testing, otherwise you'll be getting a lot of emails.

#!/bin/bash
LOAD=$( awk '$1 > 1 {print $1}' /proc/cpuload)
HOST=$(hostname)
 
[ -z "$LOAD" ] && exit
 
cat <<EOF
OVERLOAD ! - '$HOST' is overload and will down within a few minutes..
  
Monitor the server immediately..
 
PLEASE CHECK NOW !!
EOF
 
date | mail -s "SERVER OVERLOAD: '$HOST' having CPU LOAD '$LOAD'" email@email.com
exit 1

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SOLUTION

Tintin

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SOLUTION

hemmi

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ozo

Unless it is important that the decision point is between 1.00 and 1.01 rather than between 0.99 and 1.00
you could just strip the decimal portion and compare -ge 1 instead of -gt 1

Simple Bash script error &quot;integer expression expected&quot; ?

Simple Bash script error "integer expression expected" ?