1NSLOOKUP(1)                          BIND9                         NSLOOKUP(1)
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NAME

6       nslookup - query Internet name servers interactively
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SYNOPSIS

9       nslookup [-option] [name | -] [server]
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DESCRIPTION

12       Nslookup is a program to query Internet domain name servers.  Nslookup
13       has two modes: interactive and non-interactive. Interactive mode allows
14       the user to query name servers for information about various hosts and
15       domains or to print a list of hosts in a domain. Non-interactive mode
16       is used to print just the name and requested information for a host or
17       domain.
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ARGUMENTS

20       Interactive mode is entered in the following cases:
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22       1.  when no arguments are given (the default name server will be used)
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24       2.  when the first argument is a hyphen (-) and the second argument is
25           the host name or Internet address of a name server.
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27
28Non-interactive mode is used when the name or Internet address of the host to
29be looked up is given as the first argument. The optional second argument
30specifies the host name or address of a name server.
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32Options can also be specified on the command line if they precede the
33arguments and are prefixed with a hyphen. For example, to change the default
34query type to host information, and the initial timeout to 10 seconds, type:
35

INTERACTIVE COMMANDS

37       host [server]
38           Look up information for host using the current default server or
39           using server, if specified. If host is an Internet address and the
40           query type is A or PTR, the name of the host is returned. If host
41           is a name and does not have a trailing period, the search list is
42           used to qualify the name.
43
44           To look up a host not in the current domain, append a period to the
45           name.
46
47       server domain
48
49       lserver domain
50           Change the default server to domain; lserver uses the initial
51           server to look up information about domain, while server uses the
52           current default server. If an authoritative answer can't be found,
53           the names of servers that might have the answer are returned.
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55       root
56           not implemented
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58       finger
59           not implemented
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61       ls
62           not implemented
63
64       view
65           not implemented
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67       help
68           not implemented
69
70       ?
71           not implemented
72
73       exit
74           Exits the program.
75
76       set keyword[=value]
77           This command is used to change state information that affects the
78           lookups. Valid keywords are:
79
80               all
81                   Prints the current values of the frequently used options to
82                   set. Information about the current default server and host
83                   is also printed.
84
85               class=value
86                   Change the query class to one of:
87
88                       IN
89                           the Internet class
90
91                       CH
92                           the Chaos class
93
94                       HS
95                           the Hesiod class
96
97                       ANY
98                           wildcard
99
100                       The class specifies the protocol group of the
101                       information.
102
103                       (Default = IN; abbreviation = cl)
104
105                [no]debug
106                   Turn on or off the display of the full response packet and
107                   any intermediate response packets when searching.
108
109                   (Default = nodebug; abbreviation = [no]deb)
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111                [no]d2
112                   Turn debugging mode on or off. This displays more about
113                   what nslookup is doing.
114
115                   (Default = nod2)
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117               domain=name
118                   Sets the search list to name.
119
120                [no]search
121                   If the lookup request contains at least one period but
122                   doesn't end with a trailing period, append the domain names
123                   in the domain search list to the request until an answer is
124                   received.
125
126                   (Default = search)
127
128               port=value
129                   Change the default TCP/UDP name server port to value.
130
131                   (Default = 53; abbreviation = po)
132
133               querytype=value
134
135               type=value
136                   Change the type of the information query.
137
138                   (Default = A; abbreviations = q, ty)
139
140                [no]recurse
141                   Tell the name server to query other servers if it does not
142                   have the information.
143
144                   (Default = recurse; abbreviation = [no]rec)
145
146               retry=number
147                   Set the number of retries to number.
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149               timeout=number
150                   Change the initial timeout interval for waiting for a reply
151                   to number seconds.
152
153                [no]vc
154                   Always use a virtual circuit when sending requests to the
155                   server.
156
157                   (Default = novc)
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159                [no]fail
160                   Try the next nameserver if a nameserver responds with
161                   SERVFAIL or a referral (nofail) or terminate query (fail)
162                   on such a response.
163
164                   (Default = nofail)
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FILES

169       /etc/resolv.conf
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SEE ALSO

172       dig(1), host(1), named(8).
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AUTHOR

175       Andrew Cherenson
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178       Copyright © 2004-2007 Internet Systems Consortium, Inc. ("ISC")
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182BIND9                            Jun 30, 2000                      NSLOOKUP(1)
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