HOSTNAMEUTILS(1)					   Sun Grid Engine User Commands					  HOSTNAMEUTILS(1)

NAME

       sge_hostnameutils.1 - SGE Host name utilities

       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

       gethostname  and  gethostbyname	are used to get the local resolved host name.  gethostbyaddr is used to get the hostname of a specified IP
       address (dotted decimal notation).  getservbyname 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 Sun Grid Engine installation scripts.  gethostname , gethostbyname	and  gethostbyaddr  called
       without	any  option will print out the hostname, all specified aliases, and the IP address of the locally resolved hostname.  Calling get-
       servbyname 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 Sun 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 Sun Grid Engine host name.

   -all
       By using the -all option all available host information will be printed.  This information includes the host name, the Sun 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 Sun 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 Sun Grid Engine standard configuration files.

       SGE_CELL       If set, specifies the default Sun Grid Engine cell.

SEE ALSO

       sge_intro(1), host_aliases(5),

COPYRIGHT

       See sge_intro(1) for a full statement of rights and permissions.

SGE 6.2u5							      $Date$							  HOSTNAMEUTILS(1)