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/export/home/nagios/nagios/nrpe -V
/export/home/nagios/nagios/libexec/check_nrpe -V

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nagios@sun2:~/nagios/bin$ /export/home/nagios/nagios/bin/nrpe -V

NRPE - Nagios Remote Plugin Executor
Copyright (c) 1999-2008 Ethan Galstad ([email protected])
Version: 2.15
Last Modified: 09-06-2013
License: GPL v2 with exemptions (-l for more info)
SSL/TLS Available: Anonymous DH Mode, OpenSSL 0.9.6 or higher required

***************************************************************
** POSSIBLE SECURITY RISK - TCP WRAPPERS ARE NOT AVAILABLE!  **
**      Read the NRPE SECURITY file for more information     **
***************************************************************

Usage: nrpe [-n] -c <config_file> [-4|-6] <mode>

Options:
 -n            = Do not use SSL
 <config_file> = Name of config file to use
 -4            = use ipv4 only
 -6            = use ipv6 only
 <mode>        = One of the following operating modes:
   -i          =    Run as a service under inetd or xinetd
   -d          =    Run as a standalone daemon
   -d -s       =    Run as a subsystem under AIX

Notes:
This program is designed to process requests from the check_nrpe
plugin on the host(s) running Nagios.  It can run as a service
under inetd or xinetd (read the docs for info on this), or as a
standalone daemon. Once a request is received from an authorized
host, NRPE will execute the command/plugin (as defined in the
config file) and return the plugin output and return code to the
check_nrpe plugin.

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nagios@sun2:~/nagios/libexec$ /export/home/nagios/nagios/libexec/check_nrpe -V
/export/home/nagios/nagios/libexec/check_nrpe: illegal option -- V

NRPE Plugin for Nagios
Copyright (c) 1999-2008 Ethan Galstad ([email protected])
Version: 2.15
Last Modified: 09-06-2013
License: GPL v2 with exemptions (-l for more info)
SSL/TLS Available: Anonymous DH Mode, OpenSSL 0.9.6 or higher required

Usage: check_nrpe -H <host> [ -b <bindaddr> ] [-4] [-6] [-n] [-u] [-p <port>] [-t <timeout>] [-c <command>] [-a <arglist...>]

Options:
 -n         = Do no use SSL
 -u         = Make socket timeouts return an UNKNOWN state instead of CRITICAL
 <host>     = The address of the host running the NRPE daemon
 <bindaddr> = bind to local address
 -4         = user ipv4 only
 -6         = user ipv6 only
 [port]     = The port on which the daemon is running (default=5666)
 [timeout]  = Number of seconds before connection times out (default=10)
 [command]  = The name of the command that the remote daemon should run
 [arglist]  = Optional arguments that should be passed to the command.  Multiple
              arguments should be separated by a space.  If provided, this must be
              the last option supplied on the command line.

Note:
This plugin requires that you have the NRPE daemon running on the remote host.
You must also have configured the daemon to associate a specific plugin command
with the [command] option you are specifying here.  Upon receipt of the
[command] argument, the NRPE daemon will run the appropriate plugin command and
send the plugin output and return code back to *this* plugin.  This allows you
to execute plugins on remote hosts and 'fake' the results to make Nagios think
the plugin is being run locally.

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netstat -at | grep nrpe
ps -ef| grep [n]rpe
./check_nrpe -H 127.0.0.1

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kill -9 15718
/bin/nrpe -c /etc/nrpe.cfg -d

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./check_nrpe -H 127.0.0.1