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.\" 31.Dd July 10, 2018 32.Dt HOSTNAME 1 33.Os 34.Sh NAME 35.Nm hostname 36.Nd set or print name of current host system 37.Sh SYNOPSIS 38.Nm 39.Op Fl fs 40.Op Ar name-of-host | Fl r Ar ip-address | Fl i Ar interface Op Fl 6 | Fl 4 41.Sh DESCRIPTION 42The 43.Nm 44utility prints the name of the current host. 45The super-user can set the hostname by supplying an argument; 46this is usually done at boot time by setting the 47.Va hostname 48variable in 49.Pa /etc/rc.conf . 50.Pp 51Options: 52.Bl -tag -width flag 53.It Fl f 54Include domain information in the printed name. 55This is the default behavior. 56.It Fl s 57Trim off any domain information from the printed 58name. 59.It Fl r 60Retrieve hostname via ip lookup. 61The hostname is set to the first (official) 62name returned for the supplied ip address. 63Can be an IPv6 or IPv4 address. 64.It Fl i 65Retrieve hostname via supplied interface name. 66.It Fl 6 67Used in conjunction with 68.Fl i 69to select the 1st IPv6 address on the interface. 70.It Fl 4 71Used in conjunction with 72.Fl i 73to select the 1st IPv4 address on the interface. 74This is the default and assumed if 75.Fl 6 76or 77.Fl 4 78is not supplied. 79.El 80.Sh SEE ALSO 81.Xr gethostname 3 , 82.Xr rc.conf 5 83.Sh HISTORY 84The 85.Nm 86command appeared in 87.Bx 4.2 . 88