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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]

       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 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
       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) function.

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

       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

       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.

       -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

       -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)


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