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HOSTNAME(1) Linux Programmer's Manual HOSTNAME(1)
NAME
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
nodename - show or set the system's DECnet node name
SYNOPSIS
hostname [-v] [-a] [--alias] [-d] [--domain] [-f] [--fqdn] [-i] [--ip-
address] [--long] [-s] [--short] [-y] [-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]
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.
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 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).
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 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.
FILES
/etc/hosts
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 28 Jan 1996 HOSTNAME(1)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Tue Feb 13 02:16:14 GMT 2007
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