hostnameutils.1

NAME

       gethostname, gethostbyname, gethostbyaddr, getservbyname - get local
       host information

SYNTAX

       $SGE_ROOT/utilbin/$ARCH/gethostname [-help|-name|-aname|-all]

       $SGE_ROOT/utilbin/$ARCH/gethostbyname [-help|-name|-aname|-all] name

       $SGE_ROOT/utilbin/$ARCH/gethostbyaddr [-help|-name|-aname|-all] ip

       $SGE_ROOT/utilbin/$ARCH/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 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 getservbyname
       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:

              >/opt/sge/default/lx-amd64/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).

              >/opt/sge/default/lx-amd64/gethostname -all
              Hostname: extern_name.mydomain
              SGE name: gridmaster
              Aliases:  loghost gridmaster
              Host Address(es): 192.168.143.99

ENVIRONMENT 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

       sge_intro(1), host_aliases(5),

COPYRIGHT

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



SGE 8.1.3pre                      2009-03-12                  HOSTNAMEUTILS(1)