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HOSTNAME(1)	      Linux System Administrator's Manual	   HOSTNAME(1)

NAME
       hostname - show or set the system's host name
       dnsdomainname - show the system's DNS domain name
       domainname - show or set the system's NIS/YP domain name
       nisdomainname - show or set system's NIS/YP domain name
       nodename - show or set the system's DECnet node name
       ypdomainname - show or set the system's NIS/YP domain name

SYNOPSIS
       hostname [-v] [-s|--short]

       hostname	   [-v]	   [-a|--alias]	   [-d|--domain]    [-f|--fqdn|--long]
       [-i|--ip-address]

       hostname [-v] [-y|--yp|--nis] [-n|--node]

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

       domainname [-v] [-F filename|--file filename] [newname]

       nodename [-v] [-F filename|--file filename] [newname]

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

       dnsdomainname [-v]
       nisdomainname [-v]
       ypdomainname [-v]

DESCRIPTION
       Hostname is the program that is used to either set or display the  cur‐
       rent  host, domain or node name of the system.  These names are 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  gethost‐
       name(2) function.

       domainname, nisdomainname, ypdomainname will print the name of the sys‐
       tem as returned by the getdomainname(2) function. This is also known as
       the YP/NIS domain name of the system.

       nodename	 will  print the DECnet node name of the system as returned by
       the getnodename(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, the NIS/YP domain name or the node 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 dns‐
       domainname command (see THE FQDN below).

       The host name is usually set once at system startup by reading the con‐
       tents 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  canonical	name  returned	by  gethostby‐
       name2(2)	 when resolving the result of the gethostname(2) name. 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. If hosts is the first lookup method, you can
       change the FQDN in /etc/hosts.

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

       -d, --domain
	      Display the name of the DNS domain (this is the FQDN without the
	      segment  up  to  the first dot). This is equivalent to using the
	      dnsdomainname command.

       -F, --file filename
	      Read the new 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 name including the DNS domain.

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

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

       -n, --node
	      Display the DECnet node name. If a parameter is given (or --file
	      name ) the root can also set a new node name.

       -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  success‐
	      fully.

       -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.

FILES
       /etc/hostname /etc/hosts /etc/host.conf

AUTHOR
       Peter Tobias, <tobias@et-inf.fho-emden.de>
       Bernd Eckenfels, <net-tools@lina.inka.de> (NIS and manpage).
       Steve Whitehouse, <SteveW@ACM.org> (DECnet support and manpage).

net-tools			  2013-08-29			   HOSTNAME(1)
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