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Performance and Fault Management by James M. Thompson, Kent J. Phelps, Robert L. Pavone, Christopher E. Elliott, Paul L. Della Maggiora

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Syslog

The syslog protocol was first defined as part of the UNIX operating system to log messages within the OS. Syslogs allow a computer or device to deliver messages to another computer. Syslog messages have a particular format that associates a facility, and a severity or priority with a message.

The facility code allows syslog to group messages from different sources and take action based on this facility or group. The facilities are described in Table 8-7 and the priorities supported are described in Table 8-8.

Table 8-7. Syslog Facilities
Facility Description
Auth Authorization system
Cron Cron facility
Daemon System daemon
Kern Kernel
local0-7 Reserved for locally defined messages
Lpr Line printer system
Mail Mail system
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