| Numerical Code | Keyword | Facility |
|---|---|---|
| 0 | kern | kernel messages |
| 1 | user | user-level messages |
| 2 | mail system | |
| 3 | daemon | system daemons |
| 4 | auth | security/authorization messages |
| 5 | syslog | messages generated internally by syslogd |
| 6 | lpr | line printer subsystem |
| 7 | news | network news subsystem |
| 8 | uucp | UUCP subsystem |
| 9 | cron | clock daemon |
| 10 | authpriv | security/authorization messages |
| 11 | FTP daemon | |
| 12 | NTP subsystem | |
| 13 | log audit | |
| 14 | log alert | |
| 15 | clock daemon | |
| 16 | local0 | local use 0 |
| 17 | local1 | local use 1 |
| 18 | local2 | local use 2 |
| 19 | local3 | local use 3 |
| 20 | local4 | local use 4 |
| 21 | local5 | local use 5 |
| 22 | local6 | local use 6 |
| 23 | local7 | local use 8 |
The facility is one of the following keywords: auth, authpriv, cron, daemon, kern, lpr, mail, mark,
news, security (same as auth), syslog, user, uucp and local0 through local7. The keyword security
should not be used anymore and mark is only for internal use and therefore should not be used in appli‐
cations. Anyway, you may want to specify and redirect these messages here. The facility specifies the
subsystem that produced the message, i.e. all mail programs log with the mail facility (LOG_MAIL) if
they log using syslog.
| Numerical Code | Keyword | Severity |
|---|---|---|
| 0 | emerg | Emergency: system is unusable |
| 1 | alert | Alert: action must be taken immediately |
| 2 | crit | Critical: critical conditions |
| 3 | err | Error: error conditions |
| 4 | warning | Warning: warning conditions |
| 5 | notice | Notice: normal but significant condition |
| 6 | info | Informational: informational messages |
| 7 | debug | Debug: debug-level messages |
The priority is one of the following keywords, in ascending order: debug, info, notice, warning, warn
(same as warning), err, error (same as err), crit, alert, emerg, panic (same as emerg). The keywords
error, warn and panic are deprecated and should not be used anymore. The priority defines the severity
of the message.