Section: BIND9 (1)
Updated: Jun 30, 2000
:nslookup [-option] [name | -] [server]
Interactive mode is entered in the following cases:
Non-interactive mode is used when the name or Internet 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.
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
:Look up information for host using the current default server or using server, if specified. If host is an Internet address and the query type is A or PTR, the name of the host is returned. If host is a name and does not have a trailing period, the search list is used to qualify the name.
To look up a host not in the current domain, append a period to the name.
:The class specifies the protocol group of the information.
(Default = IN; abbreviation = cl)
:Turn on or off the display of the full response packet and any intermediate response packets when searching.
(Default = nodebug; abbreviation = [no]deb)
:Turn debugging mode on or off. This displays more about what nslookup is doing.
(Default = nod2)
:If the lookup request contains at least one period but doesn't end with a trailing period, append the domain names in the domain search list to the request until an answer is received.
(Default = search)
:Change the default TCP/UDP name server port to value.
(Default = 53; abbreviation = po)
:Change the type of the information query.
(Default = A; abbreviations = q, ty)
:Tell the name server to query other servers if it does not have the information.
(Default = recurse; abbreviation = [no]rec)
:Always use a virtual circuit when sending requests to the server.
(Default = novc)
:Try the next nameserver if a nameserver responds with SERVFAIL or a referral (nofail) or terminate query (fail) on such a response.
(Default = nofail)
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