TCP/IP Tutorial and Technical Overview - IBM Redbooks

452 TCP/IP Tutorial and Technical Overview
-t type The type of query required. This can be any
of the standard resource record types (see
Table 12-2 on page 438).
-w Instructs the host command to wait forever
for a reply.
name The name of the host or the address to be resolved.
server The name server to query.
nslookup
The nslookup command enables you to locate information about network nodes,
examine the contents of a name server database, and establish the accessibility
of name servers. The typical syntax for the nslookup command is:
nslookup [options] [host] [-nameserver]
Where:
options These options vary widely by platform. Refer to the
documentation for a specific implementation for information
about what options are available.
host The host name or IP address to be located.
-nameserver The name server to which the query is to be directed.
dig
dig stands for Domain Internet Groper, and enables you to exercise name
servers, gather large volumes of domain name information, and execute simple
domain name queries. The typical syntax for the dig command is:
dig @server [options] [name] [type] [class] [queryopt]
Where:
@server The DNS name server to be queried.
options Valid options typically include:
-b address The source IP address of the query-to
address.
-c class The query class. By default, this is IN
(Internet), but other valid class names
include CS (CSNET), CH (CHAOS), and HS
(Hesiod).
-f filename Causes dig to operate in batch mode, and
specifies the file from which the batch
commands can be found.