The plan was to use the Dell OpenManage plugins that I spent so long configuring within Nagios, to send temperature updates via email. The final script (after 4+ hours testing etc.) looks like this:

#!/bin/bash
##ThermoMail.sh
## Send mail notification of Machine Room Temperatures##
## Script By Jonathan Ward 01/02/2012##

##./gettemp.sh (was spereate script)##
rm /root/temperatures
echo -e “Machine Room 1 status: ” > /root/temperatures
/usr/lib/nagios/plugins/check_openmanage -H [ipaddress] –only temp >> /root/temperatures
echo -e “\n\nMachine Room 2 status: ” >> /root/temperatures
/usr/lib/nagios/plugins/check_openmanage -H [ipaddress] –only temp >> /root/temperatures
####

##Set Message Subject
msgsubject=’Machine Room Temperatures’

##Set Email Addresses with spaces not commas etc.
msgto=”mail@example.com“

##Command to send email with subject and body
mail -s “$msgsubject” “$msgto” < /root/temperatures

##DEBUGGING LINES
#echo -e “$msgbody” > /root/mailtest

Now I know this looks a little crude, and could be tidied up with some symbolic links etc. but it is a simple solution and I have scheduled a cron job to run the script 4 times a day…

The output in the email looks like this:

Linux Script for monitoring Machine Room temperatures