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diff --git a/debian/nslookup.1 b/debian/nslookup.1 new file mode 100644 index 0000000..1c68dbe --- /dev/null +++ b/debian/nslookup.1 @@ -0,0 +1,536 @@ +.\" +.\" ++Copyright++ 1985, 1989 +.\" - +.\" Copyright (c) 1985, 1989 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" - +.\" Portions Copyright (c) 1993 by Digital Equipment Corporation. +.\" +.\" Permission to use, copy, modify, and distribute this software for any +.\" purpose with or without fee is hereby granted, provided that the above +.\" copyright notice and this permission notice appear in all copies, and that +.\" the name of Digital Equipment Corporation not be used in advertising or +.\" publicity pertaining to distribution of the document or software without +.\" specific, written prior permission. +.\" +.\" THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL +.\" WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES +.\" OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT +.\" CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL +.\" DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR +.\" PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS +.\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +.\" SOFTWARE. +.\" - +.\" --Copyright-- +.\" +.\" @(#)nslookup.8 5.3 (Berkeley) 6/24/90 +.\" +.Dd June 24, 1990 +.Dt NSLOOKUP 1 +.Os BSD 4 +.Sh NAME +.Nm nslookup +.Nd query Internet name servers interactively +.Sh SYNOPSIS +.Nm nslookup +.Op Fl option Ar ... +.Op Ar host-to-find | Fl Op Ar server +.Sh DESCRIPTION +.Ic Nslookup +is a program to query Internet domain name servers. +.Ic 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. +.Sh ARGUMENTS +Interactive mode is entered in the following cases: +.Bl -tag -width "a) " +.It a) +when no arguments are given (the default name server will be used), +.It b) +when the first argument is a hyphen (-) and the second argument +is the host name or Internet address of a name server. +.El +.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 +The options listed under the +.Dq Li set +command below can be specified in +the +.Pa .nslookuprc +file in the user's home directory if they are listed +one per line. 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: +.Bd -literal -offset indent + nslookup -query=hinfo -timeout=10 +.Ed +.Sh INTERACTIVE COMMANDS +Commands may be interrupted at any time by typing a control-C. +To exit, type a control-D +.Pq Dv EOF +or type +.Li exit . +The command line length must be less than 256 characters. +To treat a built-in command as a host name, +precede it with an escape character +.Pq .&\\ . +.Sy N.B.: An unrecognized command will be interpreted as a host name. +.Bl -tag -width "lserver" +.It Ar host Op Ar server +Look up information for +.Ar host +using the current default server or using +.Ar server , +if specified. +If +.Ar host +is an Internet address and the query type is +.Dv A +or +.Dv PTR , +the name of the host is returned. +If +.Ar host +is a name and does not have a trailing period, the default +domain name is appended to the name. (This behavior depends on the state of the +.Ic set +options +.Ic domain , srchlist , defname , +and +.Ic search . ) +.Pp +To look up a host not in the current domain, append a period to +the name. +.It Ic server Ar domain +.It Ic lserver Ar domain +Change the default server to +.Ar domain ; +.Ic lserver +uses the initial server to look up information about +.Ar domain , +while +.Ic 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. +.It Ic root +Changes the default server to the server for the root of the domain name space. +Currently, the host +.Li ns.internic.net +is used. +(This command is a synonym for +.Dq Ic lserver ns.internic.net . ) +The name of the root server can be changed with the +.Dq Ic set root +command. +.It Xo Ic finger Op Ar name +.Op Ic > Ar filename +.Xc +.It Xo Ic finger Op Ar name +.Op Ic >> Ar filename +.Xc +Connects with the finger server on the current host. +The current host is defined when a previous lookup for a host +was successful and returned address information (see the +.Dq Ic set querytype=A +command). +The +.Ar name +is optional. +.Ic > +and +.Ic >> +can be used to redirect output in the usual manner. +.It Xo Ic ls Op Ar option +.Ar domain Op Ic > Ar filename +.Xc +.It Xo Ic ls Op Ar option +.Ar domain Op Ic >> Ar filename +.Xc +List the information available for +.Ar domain , +optionally creating or appending to +.Ar filename . +The default output contains host names and their Internet addresses. +.Ar Option +can be one of the following: +.Bl -tag -width "-a " +.It Fl t Ar querytype +lists all records of the specified type (see +.Ar querytype +below). +.It Fl a +lists aliases of hosts in the domain; +synonym for +.Dq Fl t Dv CNAME . +.It Fl d +lists all records for the domain; +synonym for +.Dq Fl t Dv ANY . +.It Fl h +lists CPU and operating system information for the domain; +synonym for +.Dq Fl t Dv HINFO . +.It Fl s +lists well-known services of hosts in the domain; +synonym for +.Dq Fl t Dv WKS . +.El +.Pp +When output is directed to a file, hash marks are printed for every +50 records received from the server. +.It Ic view Ar filename +Sorts and lists the output of previous +.Ic ls +command(s) with +.Xr more @CMD_EXT@ . +.It Ic help +.It Ic ? +Prints a brief summary of commands. +.It Ic exit +Exits the program. +.It Xo Ic set Ar keyword +.Ns Op = Ns Ar value +.Xc +This command is used to change state information that affects the lookups. +Valid keywords are: +.Bl -tag -width "class=v" +.It Ic all +Prints the current values of the frequently-used options to +.Ic set . +Information about the current default server and host is also printed. +.It Ic class= Ns Ar value +Change the query class to one of: +.Bl -tag -width "HESIOD " +.It Dv IN +the Internet class +.It Dv CHAOS +the Chaos class +.It Dv HESIOD +the MIT Athena Hesiod class +.It Dv ANY +wildcard (any of the above) +.El +.Pp +The class specifies the protocol group of the information. +.Pp +(Default = +.Dv IN ; +abbreviation = +.Ic cl ) +.It Xo Op Ic no +.Ns Ic debug +.Xc +Turn debugging mode on. A lot more information is printed about the +packet sent to the server and the resulting answer. +.Pp +(Default = +.Ic nodebug ; +abbreviation = +.Xo Op Ic no +.Ns Ic deb ) +.Xc +.It Xo Op Ic no +.Ns Ic d2 +.Xc +Turn exhaustive debugging mode on. +Essentially all fields of every packet are printed. +.Pp +(Default = +.Ic nod2 ) +.It Ic domain= Ns Ar name +Change the default domain name to +.Ar name . +The default domain name is appended to a lookup request depending on the +state of the +.Ic defname +and +.Ic search +options. +The domain search list contains the parents of the default domain if it has +at least two components in its name. +For example, if the default domain +is CC.Berkeley.EDU, the search list is CC.Berkeley.EDU and Berkeley.EDU. +Use the +.Dq Ic set srchlist +command to specify a different list. +Use the +.Dq Ic set all +command to display the list. +.Pp +(Default = value from +.Xr hostname @CMD_EXT@ , +.Pa /etc/resolv.conf , +or +.Ev LOCALDOMAIN; +abbreviation = +.Ic do ) +.It Ic srchlist= Ns Ar name1/name2/... +Change the default domain name to +.Ar name1 +and the domain search list +to +.Ar name1 , name2 , +etc. A maximum of 6 names separated by slashes (/) +can be specified. +For example, +.Bd -literal -offset indent +set srchlist=lcs.MIT.EDU/ai.MIT.EDU/MIT.EDU +.Ed +.Pp +sets the domain to lcs.MIT.EDU and the search list to the three names. +This command overrides the +default domain name and search list of the +.Dq Ic set domain +command. +Use the +.Dq Ic set all +command to display the list. +.Pp +(Default = value based on +.Xr hostname @CMD_EXT@ , +.Pa /etc/resolv.conf , +or +.Ev LOCALDOMAIN; +abbreviation = +.Ic srchl ) +.It Xo Op Ic no +.Ns Ic defname +.Xc +If set, append the default domain name to a single-component lookup request +(i.e., one that does not contain a period). +.Pp +(Default = +.Ic defname ; +abbreviation = +.Xo Op Ic no +.Ns Ic defname ) +.Xc +.It Xo Op Ic no +.Ns Ic search +.Xc +If the lookup request contains at least one period but +.Em doesn't +end with a trailing period, append the domain names in the domain search list +to the request until an answer is received. +.Pp +(Default = +.Ic search ; +abbreviation = +.Xo Op Ic no +.Ns Ic sea ) +.Xc +.It Ic port= Ns Ar value +Change the default TCP/UDP name server port to +.Ar value . +.Pp +(Default = 53; +abbreviation = +.Ic \&po ) +.It Ic querytype= Ns Ar value +.It Ic type= Ns Ar value +Change the type of information query to one of: +.Bl -tag -width "HINFO " +.It Dv A +the host's Internet address. +.It Dv CNAME +the canonical name for an alias. +.It Dv HINFO +the host CPU and operating system type. +.It Dv MINFO +the mailbox or mail list information. +.It Dv MX +the mail exchanger. +.It Dv NS +the name server for the named zone. +.It Dv PTR +the host name if the query is an Internet address; +otherwise, the pointer to other information. +.It Dv SOA +the domain's +.Dq start-of-authority +information. +.It Dv TXT +the text information. +.It Dv UINFO +the user information. +.It Dv WKS +the supported well-known services. +.El +.Pp +Other types +.Pq Dv ANY, AXFR, MB, MD, MF, NULL +are described in the RFC-1035 document. +.Pp +(Default = +.Dv A ; +abbreviations = +.Ic q , ty ) +.It Xo Op Ic no +.Ns Ic recurse +.Xc +Tell the name server to query other servers if it does not have the +information. +.Pp +(Default = +.Ic recurse ; +abbreviation = +.Xo Op Ic no +.Ns Ic rec ) +.Xc +.It Ic retry= Ns Ar number +Set the number of retries to +.Ar number . +When a reply to a request is not received within a certain +amount of time (changed with +.Dq Ic set timeout ) , +the timeout period is doubled and the request is resent. +The retry value controls how many times a request is resent before giving up. +.Pp +(Default = 4, abbreviation = +.Ic ret ) +.It Ic root= Ns Ar host +Change the name of the root server to +.Ar host . +This affects the +.Dq Ic root +command. +.Pp +(Default = +.Ic ns.internic.net. ; +abbreviation = +.Ic ro ) +.It Ic timeout= Ns Ar number +Change the initial timeout interval for waiting for a reply to +.Ar number +seconds. Each retry doubles the timeout period. +.Pp +(Default = 5 seconds; abbreviation = +.Ic ti ) +.It Xo Op Ic no +.Ns Ic vc +.Xc +Always use a virtual circuit when sending requests to the server. +.Pp +(Default = +.Ic novc ; +abbreviation = +.Xo Op Ic no +.Ns Ic v ) +.Xc +.It Xo Op Ic no +.Ns Ic ignoretc +.Xc +Ignore packet truncation errors. +.Pp +(Default = +.Ic noignoretc ; +abbreviation = +.Xo Op Ic no +.Ns Ic ig ) +.Xc +.El +.El +.Sh DIAGNOSTICS +If the lookup request was not successful, an error message is printed. +Possible errors are: +.Bl -tag -width "Timed" +.It Li Timed out +The server did not respond to a request after a certain amount of +time (changed with +.Dq Ic set timeout= Ns Ar value ) +and a certain number of retries (changed with +.Dq Ic set retry= Ns Ar value ) . +.It Li \&No response from server +No name server is running on the server machine. +.It Li \&No records +The server does not have resource records of the current query type for the +host, although the host name is valid. +The query type is specified with the +.Dq Ic set querytype +command. +.It Li Non-existent domain +The host or domain name does not exist. +.It Li Connection refused +.It Li Network is unreachable +The connection to the name or finger server could not be made +at the current time. +This error commonly occurs with +.Ic ls +and +.Ic finger +requests. +.It Li Server failure +The name server found an internal inconsistency in its database +and could not return a valid answer. +.It Li Refused +The name server refused to service the request. +.It Li Format error +The name server found that the request packet was not in the proper format. +It may indicate an error in +.Nm nslookup . +.El +.Sh FILES +.Bl -tag -width "/usr/share/misc/nslookup.helpXXX" -compact +.It Pa /etc/resolv.conf +initial domain name and name server addresses +.It Pa $HOME/.nslookuprc +user's initial options +.It Pa /usr/share/misc/nslookup.help +summary of commands +.El +.Sh ENVIRONMENT +.Bl -tag -width "HOSTALIASESXXXX" -compact +.It Ev HOSTALIASES +file containing host aliases +.It Ev LOCALDOMAIN +overrides default domain +.El +.Sh SEE ALSO +.Xr @INDOT@named @SYS_OPS_EXT@ , +.Xr resolver @LIB_NETWORK_EXT@ , +.Xr resolver @FORMAT_EXT@ ; +RFC-1034, +.Dq Domain Names - Concepts and Facilities ; +RFC-1035, +.Dq Domain Names - Implementation and Specification . +.Sh AUTHOR +Andrew Cherenson |