this is obsolete doc -- see http://doc.nethence.com/ instead

Installing custom Nagios NRPE scripts 

Disk usage custom script 

Fetch your custom scripts e.g., 

cd ~/bin/ 

wget http://pbraun.nethence.com/scripts/net/omreport4nagios.ksh 

wget http://pbraun.nethence.com/scripts/net/diskusage4nagios.bash 

wget http://pbraun.nethence.com/scripts/net/check_mem.sh 

wget http://pbraun.nethence.com/scripts/net/check_mem.sh.dist 

chmod +x omreport4nagios.ksh 

chmod +x diskusage4nagios.bash 

chmod +x check_mem.sh 

Creating custom NRPE plugins on the client 

Create the plugin you want e.g. in KSH, 

rpm -qa | grep ksh 

cd /usr/lib64/nagios/plugins/ 

#cd /usr/lib/nagios/plugins/ 

Note. Yes, the output needs to be on one line. 

Here's another one for RAM, 

rpm -qa | grep ksh 

cd /usr/lib64/nagios/plugins/ 

#cd /usr/lib/nagios/plugins/ 

vi check_mem.ksh 

#!/bin/ksh 

freem=`free -m` 

total=`echo "$freem" | grep ^Mem | awk '{print $2}'` 

used=`echo "$freem" | grep 'buffers/cache' | awk '{print $3}'` 

percent=$(( $used * 100 / $total )) 

#print Total memory: $total 

#print Used memory: $used 

#failed 

if (( $percent > 92 )); then 

print FAILED - $percent% used 

exit 2 

#warning 

elif (( $percent > 79 )); then 

print WARNING - $percent% used 

exit 1 

#all fine 

else 

print OK - $percent% used 

exit 0 

fi 

chmod +x check_mem.ksh 

Nagios Exchange plugins 

Fetch additional plugins from Nagios Exchange, 

cd /root/bin/ 

wget --no-check-certificate -O - "https://exchange.nagios.org/components/com_mtree/attachment.php?link_id=4174&cf_id=24" > check_mem.sh 

chmod +x check_mem.sh