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<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
NAME
gethostname -
get local hostname.
gethostbyname -
get local host information for specified hostname.
gethostbyaddr -
get hostname via IP address.
getservbyname -
get configured port number of service
SYNTAX
gethostname [-help|-name|-aname|-all]
gethostbyname [-help|-name|-aname|-all] <name>
gethostbyaddr [-help|-name|-aname|-all] <ip>
getservbyname [-help|-number] <service>
DESCRIPTION
<I>gethostname</I> and <I>gethostbyname</I> are used to get the local
resolved host name. <I>gethostbyaddr</I> is used to get the host-
name of a specified IP address (dotted decimal notation).
<I>getservbyname</I> can be used to get the configured port number
of a service (e.g. from /etc/services).
The hostname utils are primarily used by the Grid Engine
installation scripts. <I>gethostname</I> , <I>gethostbyname</I> and
<I>gethostbyaddr</I> called without any option will print out the
hostname, all specified aliases, and the IP address of the
locally resolved hostname. Calling <I>getservbyname</I> without
any option will print out the full service entry.
OPTIONS
-help
Prints a list of all options.
-name
This option only reports the primary name of the host.
-aname
If this option is set, the Grid Engine host alias file is
used for host name resolving. It is necessary to set the
environment variable SGE_ROOT and, if more than one cell is
defined, also SGE_CELL.
This option will print out the Grid Engine host name.
-all
By using the -all option all available host information will
be printed. This information includes the host name, the
Grid Engine host name, all host aliases, and the IP address
of the host.
-number
This option will print out the port number of the specified
service name.
<name>
The host name for which the information is requested.
<ip>
The IP address (dotted decimal notation) for which the
information is requested.
<service>
The service name for which the information is requested
(e.g. ftp, sge_qmaster or sge_execd).
EXAMPLES
The following example shows how to get the port number of
the FTP service:
>getservbyname -number ftp
21
The next example shows the output of gethostname -all when
the host alias file contains this line:
gridmaster extern_name extern_name.mydomain
The local host resolving must also provide the alias name
"gridmaster". Each Grid Engine host that wants to use the
cluster must be able to resolve the host name "gridmaster".
To setup an alias name, edit your /etc/hosts file or modify
your NIS setup to provide the alias for the NIS clients.
The host alias file must be readable from each host (use
e.g. NFS shared file location).
>gethostname -all
Hostname: extern_name.mydomain
SGE name: gridmaster
Aliases: loghost gridmaster
Host Address(es): 192.168.143.99
ENVIRONMENTAL VARIABLES
SGE_ROOT Specifies the location of the Grid Engine
standard configuration files.
SGE_CELL If set, specifies the default Grid Engine
cell.
SEE ALSO
<B><A HREF="../htmlman1/sge_intro.html">sge_intro(1)</A></B>, <B><A HREF="../htmlman5/SGE_H_ALIASES.html">SGE_H_ALIASES(5)</A></B>,
COPYRIGHT
See <B><A HREF="../htmlman1/sge_intro.html">sge_intro(1)</A></B> for a full statement of rights and permis-
sions.
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