DOMAINNAME linux command manual

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

       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 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.

       When  called  without  any arguments, the program displays the current

       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
       system as returned by the  getdomainname(2)  function.  This  is  also
       known as the YP/NIS domain name of the system.

       dnsdomainname  will print the domain part of the FQDN (Fully Qualified
       Domain Name). The complete FQDN of the system is returned  with  host-
       name --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  con-
       tents 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

       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.

       -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

       -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.

       -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-

       -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, 
       Bernd Eckenfels,  (NIS and manpage).
       Steve Whitehouse,  (DECnet support and manpage).

net-tools                        28 Jan 1996                      HOSTNAME(1)