Provided by: hostname_2.91.0ubuntu1_i386 bug

NAME

       hostname - show or set the system’s host name
       dnsdomainname - show the system’s DNS domain name

SYNOPSIS

       hostname  [-v] [-a] [--alias] [-d] [--domain] [-f] [--fqdn] [-i] [--ip-
       address] [--long] [-s] [--short] [-y] [--yp] [--nis]

       hostname [-v] [-F filename] [--file filename] [hostname]

       hostname [-v] [-h] [--help] [-V] [--version]

       dnsdomainname [-v]

DESCRIPTION

       Hostname is used to either set or display the current  host  or  domain
       name  of  the  system.   This  name  is  used by many of the networking
       programs to identify the machine. The  domain  name  is  also  used  by
       NIS/YP.

   GET NAME
       When  called  without  any  arguments, the program displays the current
       names:

       hostname will  print  the  name  of  the  system  as  returned  by  the
       gethostname(2) function.

       dnsdomainname  will  print the domain part of the FQDN (Fully Qualified
       Domain Name). The complete FQDN of the system is returned with hostname
       --fqdn.

   SET NAME
       When  called  with one argument or with the --file option, the commands
       set the host name or the NIS/YP domain name.

       Note, that only the super-user can change the names.

       It is not possible to set the FQDN or the  DNS  domain  name  with  the
       dnsdomainname command (see THE FQDN below).

       The   host   name   is   usually   set   once   at  system  startup  in
       /etc/rc.d/rc.inet1  or  /etc/init.d/boot  (normally  by   reading   the
       contents  of a file which contains the host name, e.g.  /etc/hostname).

   THE FQDN
       You can’t change the FQDN (as returned by hostname --fqdn) or  the  DNS
       domain  name (as returned by dnsdomainname) with this command. The FQDN
       of the system is the name that the resolver(3)  returns  for  the  host
       name.

       Technically: The FQDN is the name gethostbyname(2) returns for the host
       name returned by gethostname(2).  The DNS domain name is the part after
       the first dot.

       Therefore  it  depends on the configuration (usually in /etc/host.conf)
       how you can change it. Usually (if the hosts file is parsed before  DNS
       or NIS) you can change it in /etc/hosts.

OPTIONS

       -a, --alias
              Display the alias name of the host (if used).

       -d, --domain
              Display  the  name  of  the  DNS  domain.  Don’t use the command
              domainname to get the DNS domain name because it will  show  the
              NIS  domain  name and not the DNS domain name. Use dnsdomainname
              instead.

       -F, --file filename
              Read the host name from  the  specified  file.  Comments  (lines
              starting with a ‘#’) are ignored.

       -f, --fqdn, --long
              Display  the FQDN (Fully Qualified Domain Name). A FQDN consists
              of a short host name and the DNS domain  name.  Unless  you  are
              using  bind  or NIS for host lookups you can change the FQDN and
              the DNS  domain  name  (which  is  part  of  the  FQDN)  in  the
              /etc/hosts file.

       -h, --help
              Print a usage message and exit.

       -i, --ip-address
              Display the network address(es) of the host.

       -s, --short
              Display  the  short  host name. This is the host name cut at the
              first dot.

       -V, --version
              Print  version  information  on   standard   output   and   exit
              successfully.

       -v, --verbose
              Be verbose and tell what’s going on.

       -y, --yp, --nis
              Display  the NIS domain name. If a parameter is given (or --file
              name ) then root can also set a new NIS domain.

NOTES

       The address families hostname tries when looking up the  FQDN,  aliases
       and  network  addresses of the host are determined by the configuration
       of your resolver.  For instance, on GNU Libc systems, the resolver  can
       be  instructed  to  try IPv6 lookups first by using the inet6 option in
       /etc/resolv.conf.

FILES

       /etc/hosts

AUTHORS

       Peter Tobias, <tobias@et-inf.fho-emden.de>
       Bernd Eckenfels, <net-tools@lina.inka.de> (NIS and manpage).