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- .\" $OpenBSD: ntpd.8,v 1.5 2004/07/13 19:51:38 jmc Exp $
- .\"
- .\" Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
- .\"
- .\" Permission to use, copy, modify, and distribute this software for any
- .\" purpose with or without fee is hereby granted, provided that the above
- .\" copyright notice and this permission notice appear in all copies.
- .\"
- .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- .\" WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
- .\" AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
- .\" OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- .\"
- .Dd July 9, 2004
- .Dt NTPD 8
- .Os
- .Sh NAME
- .Nm ntpd
- .Nd "Network Time Protocol daemon"
- .Sh SYNOPSIS
- .Nm ntpd
- .Bk -words
- .Op Fl d
- .Op Fl f Ar file
- .Ek
- .Sh DESCRIPTION
- The
- .Nm
- daemon synchronizes the local clock to one or more remote NTP servers,
- and 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.
- .Pp
- .Nm
- is usually started at boot time, and can be enabled by
- setting the following in
- .Pa /etc/rc.conf.local :
- .Pp
- .Dl ntpd_flags=\&"\&"
- .Pp
- See
- .Xr rc 8
- and
- .Xr rc.conf 8
- for more information on the boot process
- and enabling daemons.
- .Pp
- When
- .Nm
- starts up, it reads settings from a configuration file,
- typically
- .Xr ntpd.conf 5 .
- .Pp
- The options are as follows:
- .Bl -tag -width "-f fileXXX"
- .It Fl d
- Do not daemonize.
- If this option is specified,
- .Nm
- will run in the foreground and log to
- .Em stderr .
- .It Fl f Ar file
- Use
- .Ar file
- as the configuration file,
- instead of the default
- .Pa /etc/ntpd.conf .
- .El
- .Sh FILES
- .Bl -tag -width "/etc/ntpd.confXXX" -compact
- .It Pa /etc/ntpd.conf
- default
- .Nm
- configuration file
- .El
- .Sh SEE ALSO
- .Xr date 1 ,
- .Xr ntpd.conf 5 ,
- .Xr rdate 8 ,
- .Xr timed 8
- .Rs
- .%R RFC 1305
- .%T "Network Time Protocol (Version 3)"
- .%D March 1992
- .Re
- .Rs
- .%R RFC 2030
- .%T "Simple Network Time Protocol (SNTP) Version 4"
- .%D October 1996
- .Re
- .Sh HISTORY
- The
- .Nm
- program first appeared in
- .Ox 3.6 .
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