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dnsdomainname(1)
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HOSTNAME !!!HOSTNAME NAME SYNOPSIS DESCRIPTION OPTIONS FILES AUTHORS ---- !!NAME hostname - show or set the system's host name dnsdomainname - show the system's DNS 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__] __hostname__ [[__-v__] [[__-h__] [[__--help__] [[__-V__] [[__--version__] __dnsdomainname__ [[__-v__] !!DESCRIPTION __Hostname__ is used to either set or display the current host or domain name of the system. This name is 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) 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 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 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__ !!AUTHORS Peter Tobias, Bernd Eckenfels, ----
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