Definitions for "Nagios "
Keywords:  nix, plugins, pager, monitor, daemon
Nagios is a daemon written in C that is designed to monitor networked hosts and services. It has the ability to notify contacts when problems arise and are resolved. Host and service checks are performed by external "plugins", making it easy to write custom checks in your language of choice.
Nagios is a powerful host and service monitoring program designed to run on most *NIX systems. It is written in C and designed to be fast and flexible. It has the ability to contact administrators via email, pager, or other user-defined methods.
Nagios is a popular open source computer system and network monitoring application software. It watches hosts and services that you specify, alerting you when things go bad and again when they get better.