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NSLOOKUP(1)			     BIND9			   NSLOOKUP(1)

NAME
       nslookup	- query	Internet name servers interactively

SYNOPSIS
       nslookup	[-option] [name	| -] [server]

DESCRIPTION
       Nslookup	is a program to	query Internet domain name servers.  Nslookup
       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.

ARGUMENTS
       Interactive mode	is entered in the following cases:

       1. when no arguments are	given (the default name	server will be used)

       2. when the first argument is a hyphen (-) and the second argument is
	  the host name	or Internet address of a name server.

       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:

       .sp

INTERACTIVE COMMANDS
       host [server]
	      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.

       server domain

       lserver domain
	      Change the default server	to domain; lserver uses	the initial
	      server to	look up	information about domain, while	server uses
	      the current default server. If an	authoritative answer can't be
	      found, the names of servers that might have the answer are
	      returned.

       root   not implemented

       finger not implemented

       ls     not implemented

       view   not implemented

       help   not implemented

       ?      not implemented

       exit   Exits the	program.

       set keyword[=value]
	      This command is used to change state information that affects
	      the lookups. Valid keywords are:

	      all    Prints the	current	values of the frequently used options
		     to	set. Information about the current default server and
		     host is also printed.

	      class=value
		     Change the	query class to one of:

		     IN	    the	Internet class

		     CH	    the	Chaos class

		     HS	    the	Hesiod class

		     ANY    wildcard

		     The class specifies the protocol group of the
		     information.

		     (Default =	IN; abbreviation = cl)

	      [no]debug
		     Turn debugging mode on. A lot more	information is printed
		     about the packet sent to the server and the resulting
		     answer.

		     (Default =	nodebug; abbreviation =	[no]deb)

	      [no]d2 Turn debugging mode on. A lot more	information is printed
		     about the packet sent to the server and the resulting
		     answer.

		     (Default =	nod2)

	      domain=name
		     Sets the search list to name.

	      [no]search
		     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)

	      port=value
		     Change the	default	TCP/UDP	name server port to value.

		     (Default =	53; abbreviation = po)

	      querytype=value

	      type=value
		     Change the	top of the information query.

		     (Default =	A; abbreviations = q, ty)

	      [no]recurse
		     Tell the name server to query other servers if it does
		     not have the information.

		     (Default =	recurse; abbreviation =	[no]rec)

	      retry=number
		     Set the number of retries to number.

	      timeout=number
		     Change the	initial	timeout	interval for waiting for a
		     reply to number seconds.

	      [no]vc Always use	a virtual circuit when sending requests	to the
		     server.

		     (Default =	novc)

FILES
       /etc/resolv.conf

SEE ALSO
       dig(1), host(1),	named(8).

AUTHOR
       Andrew Cherenson

BIND9				 Jun 30, 2000			   NSLOOKUP(1)

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | INTERACTIVE COMMANDS | FILES | SEE ALSO | AUTHOR

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