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 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  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.