Nagios Active and Passive checks with nsca and nrpe

Here is the few notes on the Nagios Active and Passive checks with nsca and nrpe:

Ref link: http://nsclient.org/nscp/wiki/doc/usage/nagios/nsca

$ dpkg --listfiles nsca-client
/.
/etc
/etc/send_nsca.cfg
/usr
/usr/share
/usr/share/doc
/usr/share/doc/nsca-client
/usr/share/doc/nsca-client/copyright
/usr/share/doc/nsca-client/NEWS.Debian.gz
/usr/share/doc/nsca-client/changelog.Debian.gz
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/send_nsca.1.gz
/usr/sbin
/usr/sbin/send_nsca


$ send_nsca --help

NSCA Client 2.7.2
Copyright (c) 2000-2007 Ethan Galstad (www.nagios.org)
Last Modified: 07-03-2007
License: GPL v2
Encryption Routines: AVAILABLE

Usage: send_nsca -H <host_address> [-p port] [-to to_sec] [-d delim] [-c config_file]

Options:
 <host_address> = The IP address of the host running the NSCA daemon
 [port]         = The port on which the daemon is running - default is 5667
 [to_sec]       = Number of seconds before connection attempt times out.
                  (default timeout is 10 seconds)
 [delim]        = Delimiter to use when parsing input (defaults to a tab)
 [config_file]  = Name of config file to use

Note:
This utility is used to send passive check results to the NSCA daemon.  Host and
Service check data that is to be sent to the NSCA daemon is read from standard
input. Input should be provided in the following format (tab-delimited unless
overriden with -d command line argument, one entry per line):

Service Checks:
<host_name>[tab]<svc_description>[tab]<return_code>[tab]<plugin_output>[newline]

Host Checks:
<host_name>[tab]<return_code>[tab]<plugin_output>[newline]



$ dpkg --listfiles nsca
/.
/etc
/etc/nsca.cfg
/etc/init.d
/etc/init.d/nsca
/usr
/usr/share
/usr/share/doc
/usr/share/doc/nsca
/usr/share/doc/nsca/examples
/usr/share/doc/nsca/examples/nsca.xinetd
/usr/share/doc/nsca/README.gz
/usr/share/doc/nsca/copyright
/usr/share/doc/nsca/README.Debian
/usr/share/lintian
/usr/share/lintian/overrides
/usr/share/lintian/overrides/nsca
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/nsca.1.gz
/usr/sbin
/usr/sbin/nsca
/usr/share/doc/nsca/NEWS.Debian.gz
/usr/share/doc/nsca/changelog.Debian.gz