onslookup/nslookup (command mode): Querying a name server in command mode

Command (non-interactive) mode is used to print just the name and requested information for a host or domain. Use the command mode entry of onslookup command to specify a single query.

Command mode query is invoked when the name or IP address of the host to be looked up is given as the first argument. The optional second argument specifies the host name or address of a name server.

Note:

The nslookup command is a synonym for the onslookup command in the z/OS UNIX shell. nslookup command syntax is the same as that for the onslookup command.
The onslookup help command works only in the interactive mode.

Format


>>-onslookup--+-----------------+--+-name----+------------------>
              | .-------------. |  '-address-'   
              | V             | |                
              '---| -Option |-+-'                

>--+----------------+------------------------------------------><
   +-server_name----+   
   '-server_address-'

Parameters

-Option: For a description of the onslookup options, see onslookup options.
name: Queries the name server for the current query-type of name. The name typically represents a host name.
address: Reverses the components of the address and generates a pointer type (PTR) query to the name server for the in-addr.arpa domain mapping of the address to a domain name.
server_name: Directs the default name server to map server_name to an IP address and then uses the name server at that address. This argument is optional. The default is the default name server found by the search order described in onslookup configuration. This name can be a name that resolves to an IPV4 or an IPv6 address.
server_address: Specifies the IP address of the name server to be queried other than the default name server. A query for the address is initially made to the default name server to map the IP address to a domain name for the server. This argument is optional. The default value is the default name server found by the search order described in onslookup configuration. This address can be an IPv4 or an IPv6 address.

Usage

Parameter values and domain names are not case sensitive.

Context

Options can also be specified on the command line if they precede the arguments and are prefixed with a hyphen. For example, to change the default query type to host information and the initial timeout to 10 seconds, type:

nslookup -query=hinfo  -timeout=10

To display a list of options, enter the following from the command line:

onslookup -h

For a complete list and description of onslookup options, see onslookup options.