There are some Unix mechanisms allowed to register different system events by loggin them to a text files, well known as Log files or logs.
The system messages are produced by:
For registering events, you can tune:
Allows you to view log files defined by module configuration.
To configure module, you must the link Module config.
(For volunteers) it's a good idea to add a feature that allows to signal user about events trough e-mail, because e-mail client programm is more clean to talk with user in a common way, and also allows you to manage messages anyway.