Most Important Interview questions on Nagios in Linux
Q
1. What is Nagios and how it Works ?.
Ans:
Nagios
is an open source System and Network Monitoring application.Nagios runs on a
server, usually as a daemon or service. Nagios periodically run plugins
residing (usually) on the same server, they contact (PING etc.) hosts and
servers on your network or on the Internet. You can also have information sent
to Nagios. You then view the status information using the web interface. You
can also receive email or SMS notifications if something happens. Event
Handlers can also be configured to "act" if something happens.
The Nagios daemon behaves like a scheduler that runs
certain scripts at certain moments. It stores the results of those scripts and
will run other scripts if these results change. All these scripts are, of
course, the scripts from the Nagios plug-in project or are scripts that you
have created.
