Section: Maintenance Commands (8)
Updated: $Mdocdate: November 10 2007 $
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- "Network Time Protocol daemon"
daemon synchronizes the local clock to one or more remote NTP servers
or local timedelta sensors.
can also act as an NTP server itself,
redistributing the local time.
It implements the Simple Network Time Protocol version 4,
as described in RFC 2030,
and the Network Time Protocol version 3,
as described in RFC 1305.
system call to correct the local system time without causing time jumps.
Adjustments larger than 128ms are logged using
with LOG_INFO priority.
The threshold value is chosen to avoid having local clock drift
thrash the log files.
be started with the
option, all calls to
will be logged.
starts up, it reads settings from a configuration file,
The options are as follows:
Do not daemonize.
If this option is specified,
will run in the foreground and log to
- -p file
Write pid to
- -f file
as the configuration file,
instead of the default
Only check the configuration file for validity.
Do not set the time immediately at startup.
This is the default.
Set the time immediately at startup if the local clock is off by more
than 180 seconds.
Allows for a large time correction,
eliminating the need to run
This option allows
to send DEBUG priority messages to syslog.
signal, it will write its peer and sensor status to syslog.
drift file, written by
periodically and used at startup to get the initial clock drift
, Network Time Protocol (Version 3), March 1992.
, Simple Network Time Protocol (SNTP) Version 4, October 1996.
program first appeared in
OpenBSD 3.6 .
- SEE ALSO
This document was created by
using the manual pages.
Time: 14:00:47 GMT, January 18, 2018