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.