On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2009-01-10 12:38 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
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
nisdomainname - show or set system’s NIS/YP domain name
ypdomainname - show or set the system’s NIS/YP domain name
SYNOPSIS
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]
DESCRIPTION
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.
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 gethostname(2) func-
tion.
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 hostname --fqdn.
The function gethostname(2) is used to get the hostname. Only when the hostname -s
is called will gethostbyname(3) be called. The difference in gethostname(2) and
gethostbyname(3) is that gethostbyname(3) is network aware, so it consults
/etc/nsswitch.conf and /etc/host.conf to decide whether to read information in
/etc/sysconfig/network or /etc/hosts the hostname is also set when the network
interface is brought up.
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 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).
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.
-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.
FILES
/etc/hosts /etc/sysconfig/network
NOTE
Note that hostname doesn’t change anything permanently. After reboot original names
from /etc/hosts are used again.
AUTHOR
Peter Tobias, <tobias AT et-inf.de>
Bernd Eckenfels, <net-tools AT lina.de> (NIS and manpage).
Steve Whitehouse, <SteveW AT ACM.org> (DECnet support and manpage).
net-tools 28 Jan 1996 HOSTNAME(1)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2009-01-10 12:38 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)