From owner-freebsd-questions@freebsd.org  Wed Mar 21 18:34:12 2018
Return-Path: <owner-freebsd-questions@freebsd.org>
Delivered-To: freebsd-questions@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 55AADF5B446
 for <freebsd-questions@mailman.ysv.freebsd.org>;
 Wed, 21 Mar 2018 18:34:12 +0000 (UTC) (envelope-from as@cmplx.uk)
Received: from jail0199.vps.exonetric.net (jail0199.vps.exonetric.net
 [IPv6:2a02:1658:1::199:1])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "jail0199.vps.exonetric.net",
 Issuer "jail0199.vps.exonetric.net" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id E1C4C7F72A
 for <freebsd-questions@freebsd.org>; Wed, 21 Mar 2018 18:34:11 +0000 (UTC)
 (envelope-from as@cmplx.uk)
Received: from jail0199.vps.exonetric.net (jail0199.vps.exonetric.net
 [178.250.76.108])
 by jail0199.vps.exonetric.net (8.15.2/8.15.2) with ESMTPS id w2LIY9es059886
 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO)
 for <freebsd-questions@freebsd.org>; Wed, 21 Mar 2018 18:34:09 GMT
 (envelope-from as@jail0199.vps.exonetric.net)
Received: (from as@localhost)
 by jail0199.vps.exonetric.net (8.15.2/8.15.2/Submit) id w2LIY9Jh059885
 for freebsd-questions@freebsd.org; Wed, 21 Mar 2018 18:34:09 GMT
 (envelope-from as)
Date: Wed, 21 Mar 2018 18:34:09 GMT
From: Anton Shterenlikht <as@cmplx.uk>
Message-Id: <201803211834.w2LIY9Jh059885@jail0199.vps.exonetric.net>
To: freebsd-questions@freebsd.org
Subject: how to set hostname on a cable line?
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.25
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 21 Mar 2018 18:34:12 -0000

I cannot seem to set hostname
correctly on a home laptop,
which has a wireless connection
to a cable router.

How do I do it?

I have

hostname=""
ifconfig_wlan0="SYNCDHCP WPA"

in /etc/rc.conf

According to rc.conf(5):

                 If dhclient(8) is used to set the hostname via DHCP, this
                 variable should be set to an empty string.

But I still get empty hostname after boot:

# hostname

# 

# cat /var/db/dhclient.leases.wlan0
lease {
  interface "wlan0";
  fixed-address 192.168.1.104;
  next-server 192.168.1.1;
  option subnet-mask 255.255.255.0;
  option routers 192.168.1.1;
  option domain-name-servers 194.168.4.100,194.168.8.100;
  option host-name "00215c5068c3";
  option domain-name "cable.virginmedia.net";
  option dhcp-lease-time 86400;
  option dhcp-message-type 5;
  option dhcp-server-identifier 192.168.1.1;
  option dhcp-renewal-time 43200;
  option dhcp-rebinding-time 75600;
  renew 4 2018/3/22 07:21:14;
  rebind 4 2018/3/22 16:21:14;
  expire 4 2018/3/22 19:21:14;
}

# cat /etc/resolv.conf
# Generated by resolvconf
search cable.virginmedia.net
nameserver 194.168.4.100
nameserver 194.168.8.100


Does that help me?

I cannot run MPI programs without having a correct
hostname, i.e. I should be able to do ssh `hostname`.

What am I missing?

Thanks

Anton