Here's a guide for getting started with monitoring Windows machines via NCPA, which interfaces with the check_ncpa plugin: https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/monitoring-windows.html NSClient++ interfaces with the check_nrpe plugin. It looks like you're using the chec...

Here's the official NSClient++ documentation on wrapped scripts: https://docs.nsclient.org/howto/external_scripts/#wrapped-scripts The ps1 wrapper is the only "complex" one; It's checking to see if the script exists, printing an error if the script doesn't exist, else running the script an...

You can build the nagios-plugins project from source: https://support.nagios.com/kb/article/nagios-plugins-installing-nagios-plugins-from-source-569.html Those are the official instructions for getting those "common plugins" built. There's a check_disk plugins that is apart of that project...

As far as adding things to the GUI goes, I did something like this on the status page a few years ago:
viewtopic.php?f=7&t=44185&p=222987#p222987

You can define modules (custom queries) and pass args into them, yeah: https://edcint.co.nz/checkwmiplus/ini-file-documentation/ It's not super well documented, though. They're basically just templated WQL queries and should allow you to do all the above. I wrote this thing a while back if Python is...

You could give this a try: https://exchange.nagios.org/directory/Plugins/Network-Protocols/SNMP/snmp-math-multiply-add/details Haven't used this plugin before, but the code looks like it does what you want. You'd simply multiply by 0.1 instead of dividing by 10. Assuming Nagios::Plugin does the thre...

Here's a reasonably good Solr plugin for Nagios: https://github.com/cpganderton/nagios-solr Unfortunately it doesn't check the /select endpoint and would need to be extended to do so. I can't actually find one that does: https://github.com/alxgomz/nagios-plugin-alfresco-search-services/blob/master/c...

Here's a related KB article: https://support.nagios.com/kb/article.php?id=518 There's a section with some troubleshooting steps specific to NSClient++ that you can attempt. Also a related forums post: https://support.nagios.com/forum/viewtopic.php?f=6&t=42993 It would also be useful to know whic...

Granted I don't have access to the 2.1.4 RPM from EPEL, I'm not able to reproduce this using a separate 2.1.4 build against 2.2.1 in EPEL: # rpm -i nagios-plugins-2.1.4-3.el7.centos.x86_64.rpm warning: nagios-plugins-2.1.4-3.el7.centos.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID ac25decd: NOKEY...

Looks as though check_ping hasn't changed in quite a long time: https://github.com/nagios-plugins/nagios-plugins/commits/master/plugins/check_ping.c $ sha256sum nagios-plugins-2.1.2/plugins/check_ping.c 746f4127c14c75d43d918c19975d13372198321bcbc6897cf37fb54bac6f9dcd *nagios-plugins-2.1.2/plugins/ch...