logwatch

Logwatch is a customizable log analysis program. It works by processing system log files and creating a daily report that highlights important system events. Logwatch can be configured to focus on specific services or types of events, such as security-related issues, service failures, or general system activity. The program's output is typically delivered via email, making it a convenient tool for system administrators to stay informed about the health and security of their servers.

Installation of Logwatch is usually straightforward on most Linux and Unix-like operating systems. Once installed, its behavior is controlled through a configuration file, often located in /etc/logwatch/logwatch.conf or within a directory like /etc/logwatch/conf.d/. This file allows users to define the level of detail in the reports, specify which services to monitor, and set various other preferences. Logwatch leverages a system of "services" and "interpreters" to parse and summarize different log file formats effectively. This modular design enables it to support a wide range of applications and system components. By automating the review of log data, Logwatch helps proactively identify and address potential problems before they escalate.