What is the function of the /var/log/secure file specifically?

The /var/log/secure file functions primarily to track authorization system usage, including security-related messages. It logs various security and authentication events, such as successful and failed login attempts, the use of the sudo command, and other events that pertain to system security and user authentication. This log is crucial for system administrators to monitor and audit authentication activities and to investigate potential security breaches or unauthorized access.

In systems running different distributions, the precise configurations and logged events may vary; however, the core purpose remains focused on security and authorization tracking. The information stored in /var/log/secure is essential for maintaining the integrity and security of a Linux system, making it a valuable resource for forensic analysis as well.