check_disk – % used space

Here is my NRPE Output:

####NRPE Command####
# /usr/local/nagios/libexec/check_disk -w 80 -c 90 -d /dev/cciss/c0d0p1

OK - /dev/cciss/c0d0p1 space used=79% | '/dev/cciss/c0d0p1 usage'=79%;80;90;

###NRPE Config in /usr/local/nagios/etc/nrpe.cfg file###

command[check_root]=/usr/local/nagios/libexec/check_disk -w 80 -c 90 -d /dev/cciss/c0d0p1

###NAGIOS SERVER CONFIG###
define service{
use generic-service
host_name test.example.local
service_description ROOT Partition
check_command check_nrpe!check_root
check_interval 15
retry_interval 1
}

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I like the fact that you report how much is used instead of how much is free.
A couple of suggestions;
Instead of getting details for all devices (df -P | grep -w $device) try just checking the needed device (df -P $device |tail -1)

I like to also see the numbers the percentage is based on in nagios - you could consider checking like this;
read size used free usedPercent rinting the results:
echo "$msg - $device space used=$usedPercent% ($used of $size used) | '$device usage'=$usedPercent%;$warning;$critical;"

Just my thoughs :)
Best regards
Theis M. Mønsted

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