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RedHat 9 (Linux i386) - man page for dnsdomainname (redhat section 1)

HOSTNAME(1)			    Linux Programmer's Manual			      HOSTNAME(1)

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

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

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

       domainname [-v] [-F filename] [--file filename] [name]

       nodename [-v] [-F filename] [--file filename] [name]

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

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

       Hostname is the program that is used to either set or display the current host, domain  or
       node name of the system.  These names are used by many of the networking programs to iden-
       tify the machine. The domain name is also used by NIS/YP.

       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.

       domainname, nisdomainname, ypdomainname will print the name of the system 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)

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

       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  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).

       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

       -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 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 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.


       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				   28 Jan 1996				      HOSTNAME(1)

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