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+.\" Copyright (C) 2004-2007, 2010, 2013-2019 Internet Systems Consortium, Inc. ("ISC")
+.\" 
+.\" This Source Code Form is subject to the terms of the Mozilla Public
+.\" License, v. 2.0. If a copy of the MPL was not distributed with this
+.\" file, You can obtain one at http://mozilla.org/MPL/2.0/.
+.\"
+.hy 0
+.ad l
+'\" t
+.\"     Title: nslookup
+.\"    Author: 
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\"      Date: 2014-01-24
+.\"    Manual: BIND9
+.\"    Source: ISC
+.\"  Language: English
+.\"
+.TH "NSLOOKUP" "1" "2014\-01\-24" "ISC" "BIND9"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+nslookup \- query Internet name servers interactively
+.SH "SYNOPSIS"
+.HP \w'\fBnslookup\fR\ 'u
+\fBnslookup\fR [\fB\-option\fR] [name\ |\ \-] [server]
+.SH "DESCRIPTION"
+.PP
+\fBNslookup\fR
+is a program to query Internet domain name servers\&.
+\fBNslookup\fR
+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\&.
+.SH "ARGUMENTS"
+.PP
+Interactive mode is entered in the following cases:
+.sp
+.RS 4
+.ie n \{\
+\h'-04' 1.\h'+01'\c
+.\}
+.el \{\
+.sp -1
+.IP "  1." 4.2
+.\}
+when no arguments are given (the default name server will be used)
+.RE
+.sp
+.RS 4
+.ie n \{\
+\h'-04' 2.\h'+01'\c
+.\}
+.el \{\
+.sp -1
+.IP "  2." 4.2
+.\}
+when the first argument is a hyphen (\-) and the second argument is the host name or Internet address of a name server\&.
+.RE
+.PP
+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\&.
+.PP
+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:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+nslookup \-query=hinfo  \-timeout=10
+.fi
+.if n \{\
+.RE
+.\}
+.PP
+The
+\fB\-version\fR
+option causes
+\fBnslookup\fR
+to print the version number and immediately exits\&.
+.SH "INTERACTIVE COMMANDS"
+.PP
+\fBhost\fR [server]
+.RS 4
+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\&.
+.sp
+To look up a host not in the current domain, append a period to the name\&.
+.RE
+.PP
+\fBserver\fR \fIdomain\fR
+.RS 4
+.RE
+.PP
+\fBlserver\fR \fIdomain\fR
+.RS 4
+Change the default server to
+\fIdomain\fR;
+\fBlserver\fR
+uses the initial server to look up information about
+\fIdomain\fR, while
+\fBserver\fR
+uses the current default server\&. If an authoritative answer can\*(Aqt be found, the names of servers that might have the answer are returned\&.
+.RE
+.PP
+\fBroot\fR
+.RS 4
+not implemented
+.RE
+.PP
+\fBfinger\fR
+.RS 4
+not implemented
+.RE
+.PP
+\fBls\fR
+.RS 4
+not implemented
+.RE
+.PP
+\fBview\fR
+.RS 4
+not implemented
+.RE
+.PP
+\fBhelp\fR
+.RS 4
+not implemented
+.RE
+.PP
+\fB?\fR
+.RS 4
+not implemented
+.RE
+.PP
+\fBexit\fR
+.RS 4
+Exits the program\&.
+.RE
+.PP
+\fBset\fR \fIkeyword\fR\fI[=value]\fR
+.RS 4
+This command is used to change state information that affects the lookups\&. Valid keywords are:
+.PP
+\fBall\fR
+.RS 4
+Prints the current values of the frequently used options to
+\fBset\fR\&. Information about the current default server and host is also printed\&.
+.RE
+.PP
+\fBclass=\fR\fIvalue\fR
+.RS 4
+Change the query class to one of:
+.PP
+\fBIN\fR
+.RS 4
+the Internet class
+.RE
+.PP
+\fBCH\fR
+.RS 4
+the Chaos class
+.RE
+.PP
+\fBHS\fR
+.RS 4
+the Hesiod class
+.RE
+.PP
+\fBANY\fR
+.RS 4
+wildcard
+.RE
+.sp
+The class specifies the protocol group of the information\&.
+.sp
+(Default = IN; abbreviation = cl)
+.RE
+.PP
+\fB\fI[no]\fR\fR\fBdebug\fR
+.RS 4
+Turn on or off the display of the full response packet and any intermediate response packets when searching\&.
+.sp
+(Default = nodebug; abbreviation =
+[no]deb)
+.RE
+.PP
+\fB\fI[no]\fR\fR\fBd2\fR
+.RS 4
+Turn debugging mode on or off\&. This displays more about what nslookup is doing\&.
+.sp
+(Default = nod2)
+.RE
+.PP
+\fBdomain=\fR\fIname\fR
+.RS 4
+Sets the search list to
+\fIname\fR\&.
+.RE
+.PP
+\fB\fI[no]\fR\fR\fBsearch\fR
+.RS 4
+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\&.
+.sp
+(Default = search)
+.RE
+.PP
+\fBport=\fR\fIvalue\fR
+.RS 4
+Change the default TCP/UDP name server port to
+\fIvalue\fR\&.
+.sp
+(Default = 53; abbreviation = po)
+.RE
+.PP
+\fBquerytype=\fR\fIvalue\fR
+.RS 4
+.RE
+.PP
+\fBtype=\fR\fIvalue\fR
+.RS 4
+Change the type of the information query\&.
+.sp
+(Default = A; abbreviations = q, ty)
+.RE
+.PP
+\fB\fI[no]\fR\fR\fBrecurse\fR
+.RS 4
+Tell the name server to query other servers if it does not have the information\&.
+.sp
+(Default = recurse; abbreviation = [no]rec)
+.RE
+.PP
+\fBndots=\fR\fInumber\fR
+.RS 4
+Set the number of dots (label separators) in a domain that will disable searching\&. Absolute names always stop searching\&.
+.RE
+.PP
+\fBretry=\fR\fInumber\fR
+.RS 4
+Set the number of retries to number\&.
+.RE
+.PP
+\fBtimeout=\fR\fInumber\fR
+.RS 4
+Change the initial timeout interval for waiting for a reply to number seconds\&.
+.RE
+.PP
+\fB\fI[no]\fR\fR\fBvc\fR
+.RS 4
+Always use a virtual circuit when sending requests to the server\&.
+.sp
+(Default = novc)
+.RE
+.PP
+\fB\fI[no]\fR\fR\fBfail\fR
+.RS 4
+Try the next nameserver if a nameserver responds with SERVFAIL or a referral (nofail) or terminate query (fail) on such a response\&.
+.sp
+(Default = nofail)
+.RE
+.sp
+.RE
+.SH "RETURN VALUES"
+.PP
+\fBnslookup\fR
+returns with an exit status of 1 if any query failed, and 0 otherwise\&.
+.SH "FILES"
+.PP
+/etc/resolv\&.conf
+.SH "SEE ALSO"
+.PP
+\fBdig\fR(1),
+\fBhost\fR(1),
+\fBnamed\fR(8)\&.
+.SH "AUTHOR"
+.PP
+\fBInternet Systems Consortium, Inc\&.\fR
+.SH "COPYRIGHT"
+.br
+Copyright \(co 2004-2007, 2010, 2013-2019 Internet Systems Consortium, Inc. ("ISC")
+.br