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NSLOOKUP(1) | BIND9 | NSLOOKUP(1) |
NAME¶
nslookup - query Internet name servers interactivelySYNOPSIS¶
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.
nslookup -query=hinfo -timeout=10
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:
[no]debug
IN
the Internet class
CH
the Chaos class
HS
the Hesiod class
ANY
wildcard
- The class specifies the protocol group of the information.
Turn on or off the display of the full
response packet and any intermediate response packets when searching.
(Default = nodebug; abbreviation = [no]deb)
[no]d2
Turn debugging mode on or off. This displays
more about what nslookup is doing.
(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 type 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)
ndots=number
Set the number of dots (label separators) in a
domain that will disable searching. Absolute names always stop
searching.
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)
[no]fail
Try the next nameserver if a nameserver
responds with SERVFAIL or a referral (nofail) or terminate query (fail) on
such a response.
(Default = nofail)
FILES¶
/etc/resolv.confSEE ALSO¶
dig(1), host(1), named(8).AUTHOR¶
Andrew CherensonCOPYRIGHT¶
Copyright © 2004-2007, 2010, 2013, 2014 Internet Systems Consortium, Inc. ("ISC")June 30, 2000 | BIND9 |