Managing System Logging
Advanced settings have reasonable defaults in place. A warning message displays for some settings advising of the dangers of making changes. Changing advanced settings can be dangerous when done incorrectly. Use caution before saving changes.
Make sure you are comfortable with ZFS, Linux, and system configuration, backup, and restoration before making any changes.
By default, TrueNAS writes system logs to the system boot device. The Syslog widget on the System > Advanced Settings screen allows users determine how and when the system sends log messages to a connected syslog server. The Syslog widget displays the existing system logging settings.