74 lines
2.2 KiB
Groff
74 lines
2.2 KiB
Groff
.\" $NetBSD: rdate.8,v 1.14 2017/08/27 20:45:47 wiz Exp $
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.\"
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.\" Copyright (c) 1994 Christos Zoulas
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 26, 2017
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.Dt RDATE 8
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.Os
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.Sh NAME
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.Nm rdate
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.Nd set the system's date from a remote host
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.Sh SYNOPSIS
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.Nm
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.Op Fl 46aps
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.Ar host
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.Sh DESCRIPTION
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.Nm
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displays and sets the local date and time from the
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host name or address given as the argument.
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It uses the RFC 868 protocol which is usually implemented as a
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built-in service of
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.Xr inetd 8 .
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.Pp
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Available options:
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.Bl -tag -width indent
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.It Fl 4
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Forces
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.Nm
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to use IPv4 addresses only.
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.It Fl 6
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Forces
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.Nm
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to use IPv6 addresses only.
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.It Fl a
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Use the
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.Xr adjtime 2
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call to gradually skew the local time to the
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remote time rather than just hopping.
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.It Fl p
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Do not set, just print the remote time
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.It Fl s
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Do not print the time.
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.El
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.Sh FILES
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.Bl -tag -width /var/log/wtmp -compact
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.It Pa /var/log/wtmp
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A record of date resets and time changes.
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.El
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.Sh SEE ALSO
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.Xr adjtime 2 ,
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.Xr gettimeofday 2 ,
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.Xr utmp 5 ,
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.Xr inetd 8
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