Sending instant message via Jabber.
Instan alert messages can be sent to user’s via integrating the Jabber plugin.
This can be done via below steps -
Create jabber plugin via perl script as mentioned in - https://www.gridpp.ac.uk/wiki/Nagios_jabber_notification
Configuring & enabling the command within command.cfg file.
Verify new configuration via - #nagios -v /etc/nagios/nagios.cfg
Restart Nagios.