What are the different log levels in systemd journalctl?

What are the different log levels in systemd journalctl?

In systemd journalctl, the log levels include emerg, alert, crit, err, warning, notice, info, and debug. Each level indicates the severity of the log message.

Can you explain what each log level means?

Sure! Here's a brief overview:

• emerg: system is unusable
• alert: action must be taken immediately
• crit: critical conditions
• err: error conditions
• warning: warning conditions
• notice: normal but significant condition
• info: informational messages
• debug: debug-level messages.

How can I filter logs by a specific level using journalctl?

You can filter logs by level using the -p option followed by the log level. For example, journalctl -p err will show only error messages.

Is there a way to view logs in real-time?

Yes, you can use the -f option with journalctl to follow logs in real-time, like this: journalctl -f.