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.\" Copyright (C) 2004-2007, 2010, 2013-2016 Internet Systems Consortium, Inc. ("ISC") |
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.\" |
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.\" Permission to use, copy, modify, and/or distribute this software for any |
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.\" purpose with or without fee is hereby granted, provided that the above |
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.\" copyright notice and this permission notice appear in all copies. |
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.\" |
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH |
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.\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
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.\" AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, |
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.\" INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM |
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.\" LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE |
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.\" OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
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.\" PERFORMANCE OF THIS SOFTWARE. |
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.\" |
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.hy 0 |
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.ad l |
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'\" t |
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.\" Title: nslookup |
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.\" Author: |
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.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/> |
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.\" Date: 2014-01-24 |
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.\" Manual: BIND9 |
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.\" Source: ISC |
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.\" Language: English |
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.\" |
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.TH "NSLOOKUP" "1" "2014\-01\-24" "ISC" "BIND9" |
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.\" ----------------------------------------------------------------- |
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.\" * Define some portability stuff |
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.\" ----------------------------------------------------------------- |
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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.\" http://bugs.debian.org/507673 |
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html |
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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.ie \n(.g .ds Aq \(aq |
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.el .ds Aq ' |
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.\" ----------------------------------------------------------------- |
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.\" * set default formatting |
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.\" ----------------------------------------------------------------- |
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.\" disable hyphenation |
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.nh |
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.\" disable justification (adjust text to left margin only) |
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.ad l |
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.\" ----------------------------------------------------------------- |
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.\" * MAIN CONTENT STARTS HERE * |
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.\" ----------------------------------------------------------------- |
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.SH "NAME" |
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nslookup \- query Internet name servers interactively |
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.SH "SYNOPSIS" |
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.HP \w'\fBnslookup\fR\ 'u |
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\fBnslookup\fR [\fB\-option\fR] [name\ |\ \-] [server] |
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.SH "DESCRIPTION" |
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.PP |
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\fBNslookup\fR |
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is a program to query Internet domain name servers\&. |
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\fBNslookup\fR |
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has two modes: interactive and non\-interactive\&. Interactive mode allows the user to query name servers for information about various hosts and domains or to print a list of hosts in a domain\&. Non\-interactive mode is used to print just the name and requested information for a host or domain\&. |
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.SH "ARGUMENTS" |
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.PP |
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Interactive mode is entered in the following cases: |
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.sp |
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.RS 4 |
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.ie n \{\ |
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\h'-04' 1.\h'+01'\c |
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.\} |
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.el \{\ |
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.sp -1 |
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.IP " 1." 4.2 |
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.\} |
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when no arguments are given (the default name server will be used) |
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.RE |
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.sp |
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.RS 4 |
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.ie n \{\ |
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\h'-04' 2.\h'+01'\c |
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.\} |
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.el \{\ |
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.sp -1 |
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.IP " 2." 4.2 |
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.\} |
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when the first argument is a hyphen (\-) and the second argument is the host name or Internet address of a name server\&. |
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.RE |
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.PP |
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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\&. |
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.PP |
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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: |
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.sp |
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.if n \{\ |
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.RS 4 |
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.\} |
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.nf |
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nslookup \-query=hinfo \-timeout=10 |
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.fi |
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.if n \{\ |
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.RE |
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.\} |
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.PP |
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The |
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\fB\-version\fR |
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option causes |
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\fBnslookup\fR |
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to print the version number and immediately exits\&. |
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.SH "INTERACTIVE COMMANDS" |
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.PP |
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\fBhost\fR [server] |
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.RS 4 |
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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\&. |
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.sp |
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To look up a host not in the current domain, append a period to the name\&. |
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.RE |
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.PP |
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\fBserver\fR \fIdomain\fR |
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.RS 4 |
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.RE |
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.PP |
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\fBlserver\fR \fIdomain\fR |
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.RS 4 |
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Change the default server to |
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\fIdomain\fR; |
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\fBlserver\fR |
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uses the initial server to look up information about |
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\fIdomain\fR, while |
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\fBserver\fR |
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uses the current default server\&. If an authoritative answer can\*(Aqt be found, the names of servers that might have the answer are returned\&. |
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.RE |
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.PP |
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\fBroot\fR |
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.RS 4 |
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not implemented |
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.RE |
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.PP |
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\fBfinger\fR |
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.RS 4 |
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not implemented |
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.RE |
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.PP |
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\fBls\fR |
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.RS 4 |
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not implemented |
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.RE |
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.PP |
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\fBview\fR |
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.RS 4 |
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not implemented |
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.RE |
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.PP |
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\fBhelp\fR |
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.RS 4 |
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not implemented |
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.RE |
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.PP |
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\fB?\fR |
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.RS 4 |
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not implemented |
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.RE |
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.PP |
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\fBexit\fR |
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.RS 4 |
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Exits the program\&. |
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.RE |
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.PP |
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\fBset\fR \fIkeyword\fR\fI[=value]\fR |
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.RS 4 |
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This command is used to change state information that affects the lookups\&. Valid keywords are: |
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.PP |
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\fBall\fR |
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.RS 4 |
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Prints the current values of the frequently used options to |
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\fBset\fR\&. Information about the current default server and host is also printed\&. |
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.RE |
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.PP |
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\fBclass=\fR\fIvalue\fR |
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.RS 4 |
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Change the query class to one of: |
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.PP |
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\fBIN\fR |
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.RS 4 |
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the Internet class |
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.RE |
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.PP |
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\fBCH\fR |
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.RS 4 |
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the Chaos class |
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.RE |
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.PP |
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\fBHS\fR |
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.RS 4 |
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the Hesiod class |
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.RE |
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.PP |
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\fBANY\fR |
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.RS 4 |
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wildcard |
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.RE |
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.sp |
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The class specifies the protocol group of the information\&. |
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.sp |
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(Default = IN; abbreviation = cl) |
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.RE |
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.PP |
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\fB \fR\fB\fI[no]\fR\fR\fBdebug\fR |
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.RS 4 |
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Turn on or off the display of the full response packet and any intermediate response packets when searching\&. |
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.sp |
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(Default = nodebug; abbreviation = |
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[no]deb) |
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.RE |
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.PP |
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\fB \fR\fB\fI[no]\fR\fR\fBd2\fR |
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.RS 4 |
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Turn debugging mode on or off\&. This displays more about what nslookup is doing\&. |
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.sp |
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(Default = nod2) |
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.RE |
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.PP |
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\fBdomain=\fR\fIname\fR |
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.RS 4 |
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Sets the search list to |
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\fIname\fR\&. |
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.RE |
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.PP |
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\fB \fR\fB\fI[no]\fR\fR\fBsearch\fR |
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.RS 4 |
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If the lookup request contains at least one period but doesn\*(Aqt end with a trailing period, append the domain names in the domain search list to the request until an answer is received\&. |
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.sp |
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(Default = search) |
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.RE |
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.PP |
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\fBport=\fR\fIvalue\fR |
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.RS 4 |
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Change the default TCP/UDP name server port to |
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\fIvalue\fR\&. |
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.sp |
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(Default = 53; abbreviation = po) |
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.RE |
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.PP |
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\fBquerytype=\fR\fIvalue\fR |
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.RS 4 |
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.RE |
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.PP |
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\fBtype=\fR\fIvalue\fR |
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.RS 4 |
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Change the type of the information query\&. |
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.sp |
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(Default = A; abbreviations = q, ty) |
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.RE |
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.PP |
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\fB \fR\fB\fI[no]\fR\fR\fBrecurse\fR |
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.RS 4 |
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Tell the name server to query other servers if it does not have the information\&. |
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.sp |
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(Default = recurse; abbreviation = [no]rec) |
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.RE |
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.PP |
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\fBndots=\fR\fInumber\fR |
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.RS 4 |
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Set the number of dots (label separators) in a domain that will disable searching\&. Absolute names always stop searching\&. |
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.RE |
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.PP |
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\fBretry=\fR\fInumber\fR |
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.RS 4 |
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Set the number of retries to number\&. |
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.RE |
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.PP |
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\fBtimeout=\fR\fInumber\fR |
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.RS 4 |
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Change the initial timeout interval for waiting for a reply to number seconds\&. |
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.RE |
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.PP |
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\fB \fR\fB\fI[no]\fR\fR\fBvc\fR |
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.RS 4 |
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Always use a virtual circuit when sending requests to the server\&. |
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.sp |
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(Default = novc) |
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.RE |
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.PP |
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\fB \fR\fB\fI[no]\fR\fR\fBfail\fR |
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.RS 4 |
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Try the next nameserver if a nameserver responds with SERVFAIL or a referral (nofail) or terminate query (fail) on such a response\&. |
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.sp |
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(Default = nofail) |
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.RE |
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.sp |
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.RE |
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.SH "RETURN VALUES" |
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.PP |
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\fBnslookup\fR |
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returns with an exit status of 1 if any query failed, and 0 otherwise\&. |
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.SH "FILES" |
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.PP |
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/etc/resolv\&.conf |
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.SH "SEE ALSO" |
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.PP |
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\fBdig\fR(1), |
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\fBhost\fR(1), |
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\fBnamed\fR(8)\&. |
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.SH "AUTHOR" |
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.PP |
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\fBInternet Systems Consortium, Inc\&.\fR |
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.SH "COPYRIGHT" |
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.br |
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Copyright \(co 2004-2007, 2010, 2013-2016 Internet Systems Consortium, Inc. ("ISC") |
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.br |
