It looks like your config for Nagios is fine. The issues is you are missing the RC Init Script. ( /etc/rc.d/init.d/nagios )
Different Linux distros handle this differently, can you provide more information on what Linux distro you are running?
Did you install it via the package manager? It should have had an Init script for you. If you installed it via the tarball, you will likely have to create your own or get on from the package manager (rpm, apt, emerge…)
Hope that starts you in the correct direction.
thanks for answer
Nagios installed on RedHat Linux with command line.
I find only one file with name nagios in /usr/local/nagios/bin/nagios but /usr/local/nagios/bin/nagios start returns
[quote]Nagios Core 3.2.0
Copyright © 2009 Nagios Core Development Team and Community Contributors
Copyright © 1999-2009 Ethan Galstad
Last Modified: 08-12-2009
Error: Cannot open main configuration file ‘/root/start’ for reading!
Nagios 3.2.0 starting… (PID=5732)
Local time is Tue Jan 26 09:42:22 CST 2010
Bailing out due to one or more errors encountered in the configuration files. Run Nagios from the command line with the -v option to verify your config before restarting. (PID=5732)
Is it right file, or I need to serach that file in different place?