OS level checks on Nagios

Ubuntu OS Release Check

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Login to server

• cd /home/Nagios/bin/

• ls

We can see here different file in red and purple color

- Purple color file – Already installed plugins

- Red color file – We have configured that

Also we have created symlink for purple color files, which have already installed plugins.

Purpose of symlink is, if installed some server updates or restarts server, then also we don’t have replace that plugins again at /home/Nagios/bin/

If we have to check OS release, then run below command

• ./check_os_release.py

Configuring OS Release Check for Server

Ex. for dev.apoyar

Login to nagios.apoyar

• As nagios user and enter password (Locutus1)

• cd /plugins

Copy python config file from Nagios.apoyar to dev.apoyar using below command

• scp check_os_release.py dev.apoyar:/home/nagios/bin/

Then exit Nagios user and login as neal

• su

• Password – ap0yar

• Go to below path

• cd /usr/local/etc/nagios/objects/

• vi services.cfg

and add server name (ApoyarDev) under OS Release in hostnames

save and exit file (:wq!)

Run below command for syntax error check

• /usr/local/bin/nagios -v /usr/local/etc/nagios/nagios.cfg

And at last restart Nagios process fom nagios.apoyar.net