Syslog Logging Levels

Syslog logging levels, also known as severity levels, indicate the importance or urgency of log messages. They range from 0 to 7, with 0 being the most severe and 7 being the least severe:

0: Emergency, the system is unusable

1: Alert, action must be taken immediately

2: Critical, critical conditions

3: Error (error): error conditions

4: Warning (warn): warning conditions

5: Notice (notice): normal but significant conditions

6: Informational (info): informational messages

7: Debug (debug): messages helpful for debugging

Log levels help prioritize responses and actions. For example, alert and emergency messages are used when something bad is going on, while critical, error, and warning messages are used for important events.

Syslog is a centralized logging system that collects messages from various devices and applications. It's used for monitoring, troubleshooting, and security analysis.

Normal logging is set to 0 through 4 and are forwarded, events for levels 5 through 7 are not forwarded.