Bofhlog is a simple tool for "active" and "passive" monitoring of Unix log files. "Active" means that you can see the changes in log files on the screen as new log entries are entered by syslog. It is the same functionality that "tail -f" offers, except that bofhlog can handle logrotate. "Passive" means that you don't have to watch the logs all the time; bofhlog can email or contact you by other means if something "critical" is entered in the log files. "Critical" means that bofhlog can be used both as a lightweight security auditing tool and as an error diagnostic tool for a Unix system.