Nagios Support Forum

Ok, from one of the machines I'm trying to monitor (which is a Debian 12 lxc): dpkg -l | grep libssl-dev ii libssl-dev:amd64 3.0.19-1~deb12u2 amd64 Secure Sockets Layer toolkit - development files dpkg -l | grep gcc ii gcc 4:12.2.0-3 amd64 GNU C compiler ii gcc-12 12.2.0-14+deb12u1 amd64 GNU C compi...

I followed exactly the instructions in the PDF guide linked. So the first two will be exactly as the guide states

This is all on Ubuntu 24.04 (even starting with a fresh install for core & even a clean install for a machine to monitor)

Hi, I have installed Nagios Core on a machine and am trying to setup monitoring of Linux machines. NRPE has been setup on both the monitoring server and also the other machines as per this guide https://assets.nagios.com/downloads/nagioscore/docs/nrpe/NRPE.pdf Testing the connection from the command...