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.