NTP Logging

The NTP Logging configuration controls which type of events are logged by the NTP daemon. By default, the NTP daemon will log all synchronization messages.

The NTP daemon will log some messages via syslog, but it places additional more detailed logging data into separate files within the directory configured with the logdir option in config-ntp mode.

See also

See System Logs for information on viewing log data and configuring remote logging.

Refer to the Chrony logging documentation for more details on the contents and format of log messages.

The logging configuration is set using the log command from within config-ntp mode which changes to config-ntp-log mode where the following commands are available:

rawmeasurements

Enables logging of raw NTP measurements and other data for each NTP packet to measurements.log in the configured log directory. Useful for debugging.

measurements

Works similarly to rawmeasurements, except it only logs messages with valid measurements from synchronized sources.

refclocks

Logs reference clock measurements to refclocks.log in the configured log directory.

rtc

Logs information about the hardware real-time clock.

selection

Logs information about how the NTP daemon selects sources to selection.log in the configured log directory.

statistics

Logs information about regression processing to statistics.log in the configured log directory.

tempcomp

Logs temperature measurements and rate compensations to tempcomp.log in the configured log directory.

tracking

Logs changes to the estimate of the gain or loss rate for the clock, and any slews the NTP daemon has made, to tracking.log in the configured log directory.