errpt

系统级的log信息来源有很多种：includes boot messages, login and authorization information, and service startup/shutdown. In addition, syslog is often used to record e-mail messages delivery, filesystem issues, and even DHCP leases, DNS issues, and NFS problems.
又会根据紧急程度分为：warning, error, critical, and emergency
可以根据配置策略写到很多不同的log文件中，配置文件为/etc/syslog.conf，缺省配置可以参考其sample文件。