nagios3

nagios3 [options] configfile_

nagios3 is the version 3 daemon of the Nagios IT infrastructure monitoring system. It monitors hosts and services, schedules active checks, processes passive results, and triggers notifications when state transitions occur. Configuration is split across nagios.cfg (main settings), resource.cfg (macros and secrets), and object files defining hosts, services, contacts, and commands.Use -v to validate configuration before restarting the daemon, -d to launch it as a daemon (typically managed by a service unit), and -s to display scheduling and load distribution information. Nagios 3 is a legacy release; new deployments should use Nagios 4 or Nagios Core's modern packaging.

-v

Verify configuration.

Run as daemon.

Show scheduling information.

Show help.

No longer actively developed; security and bug fixes are limited. Configuration syntax differs from Nagios Core 4. The CGI web interface relies on httpd authentication and is not exposed over HTTPS by default.

nagios4(1), check_mk(1), naemon(1)