MAN page from Old RedHat 5.X net-tools-1.33-6.i386.rpm
HOSTNAME
Section: Linux Programmer's Manual (1)
Updated: 28 Jan 1996
Index
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]
hostname [-v][-F filename][--file filename][hostname]
domainname[-v][-F filename][--file filename][name]
hostname[-v][-h][--help][-V][--version]
dnsdomainname[-v]
nisdomainname[-v]
ypdomainname[-v]
DESCRIPTION
Hostnameis the program that is used to either set or displaythe current host or domain name of the system. This name is usedby 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 currentnames:
hostnamewill print the name of the system as returned by thegethostname(2)function.
domainname, nisdomainname, ypdomainnamewill print the name of the system as returned by thegetdomainname(2)function. This is also known as the YP/NIS domain name of the system.
dnsdomainnamewill print the domain part of the FQDN (Fully Qualified Domain Name). Thecomplete FQDN of the system is returned withhostname --fqdn.
SET NAME
When called with one argument or with the
--fileoption, the commands set the host name or the NIS/YP domain 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 FQDNbelow).
The host name is usually set once at system startup in/etc/rc.d/rc.inet1or/etc/init.d/boot(normally by reading the contents of a file which containsthe 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 namegethostbyname(2)returns for the host name returned bygethostname(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 commanddomainnameto get the DNS domain name because it will show the NIS domain name andnot the DNS domain name. Usednsdomainname instead.
- -F, --file filename
- Read the host name from the specified file. Comments (lines starting witha `#') are ignored.
- -f, --fqdn, --long
- Display the FQDN (Fully Qualified Domain Name). A FQDN consists of ashort host name and the DNS domain name. Unless you are using bind or NISfor host lookups you can change the FQDN and the DNS domain name (which ispart 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 AUTHOR
Peter Tobias, <tobiasAATTet-inf.fho-emden.de>
Bernd Eckenfels, <net-toolsAATTlina.inka.de> (NIS and manpage).
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- GET NAME
- SET NAME
- THE FQDN
- OPTIONS
- FILES
- AUTHOR
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