1.\" Copyright (c) 1983, 1988, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)hostname.1 8.2 (Berkeley) 4/28/95 29.\" $FreeBSD: src/bin/hostname/hostname.1,v 1.10.2.4 2002/04/22 22:20:29 keramida Exp $ 30.\" $DragonFly: src/bin/hostname/hostname.1,v 1.5 2007/12/16 02:55:37 thomas Exp $ 31.\" 32.Dd April 28, 1995 33.Dt HOSTNAME 1 34.Os 35.Sh NAME 36.Nm hostname 37.Nd set or print name of current host system 38.Sh SYNOPSIS 39.Nm 40.Op Fl s 41.Op Ar name-of-host | Fl r Ar ip-address | Fl i Ar interface Op Fl 6 | Fl 4 42.Sh DESCRIPTION 43The 44.Nm 45utility prints the name of the current host. 46The super-user can set the hostname by supplying an argument; 47this is usually done at boot time by setting the 48.Va hostname 49variable in 50.Pa /etc/rc.conf . 51.Pp 52Options: 53.Bl -tag -width flag 54.It Fl s 55Trim off any domain information from the printed 56name. 57.It Fl r 58Retrieve hostname via ip lookup. 59The hostname is set to the first (official) 60name returned for the supplied ip address. 61Can be an IPv6 or IPv4 address. 62.It Fl i 63Retrieve hostname via supplied interface name. 64.It Fl 6 65Used in conjunction with 66.Fl i 67to select the 1st IPv6 address on the interface. 68.It Fl 4 69Used in conjunction with 70.Fl i 71to select the 1st IPv4 address on the interface. 72This is the default and assumed if 73.Fl 6 74or 75.Fl 4 76is not supplied. 77.El 78.Sh SEE ALSO 79.Xr gethostname 3 , 80.Xr rc.conf 5 81.Sh HISTORY 82The 83.Nm 84command appeared in 85.Bx 4.2 . 86