[[man_de_host]]

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man_de_host [2016/03/30 15:33] (Version actuelle)
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 +==== Manuel de la commande "​host"​ ====
 +
 +<​code>​
 +HOST(1) ​                                                          ​BIND9 ​                                                         HOST(1)
 +
 +
 +
 +NAME
 +       host - DNS lookup utility
 +
 +SYNOPSIS
 +       host [-aCdlnrsTwv] [-c class] [-N ndots] [-R number] [-t type] [-W wait] [-m flag] [-4] [-6] {name} [server]
 +
 +DESCRIPTION
 +       host is a simple utility for performing DNS lookups. It is normally used to convert names to IP addresses and vice versa. When no
 +       ​arguments or options are given, host prints a short summary of its command line arguments and options.
 +
 +       name is the domain name that is to be looked up. It can also be a dotted-decimal IPv4 address or a colon-delimited IPv6 address,
 +       in which case host will by default perform a reverse lookup for that address. ​ server is an optional argument which is either the
 +       name or IP address of the name server that host should query instead of the server or servers listed in /​etc/​resolv.conf.
 +
 +       The -a (all) option is equivalent to setting the -v option and asking host to make a query of type ANY.
 +
 +       When the -C option is used, host will attempt to display the SOA records for zone name from all the listed authoritative name
 +       ​servers for that zone. The list of name servers is defined by the NS records that are found for the zone.
 +
 +       The -c option instructs to make a DNS query of class class. This can be used to lookup Hesiod or Chaosnet class resource records.
 +       The default class is IN (Internet).
 +
 +       ​Verbose output is generated by host when the -d or -v option is used. The two options are equivalent. They have been provided for
 +       ​backwards compatibility. In previous versions, the -d option switched on debugging traces and -v enabled verbose output.
 +
 +       List mode is selected by the -l option. This makes host perform a zone transfer for zone name. Transfer the zone printing out the
 +       NS, PTR and address records (A/AAAA). If combined with -a all records will be printed.
 +
 +       The -i option specifies that reverse lookups of IPv6 addresses should use the IP6.INT domain as defined in RFC1886. The default
 +       is to use IP6.ARPA.
 +
 +       The -N option sets the number of dots that have to be in name for it to be considered absolute. The default value is that defined
 +       using the ndots statement in /​etc/​resolv.conf,​ or 1 if no ndots statement is present. Names with fewer dots are interpreted as
 +       ​relative names and will be searched for in the domains listed in the search or domain directive in /​etc/​resolv.conf.
 +
 +       The number of UDP retries for a lookup can be changed with the -R option. ​ number indicates how many times host will repeat a
 +       query that does not get answered. The default number of retries is 1. If number is negative or zero, the number of retries will
 +       ​default to 1.
 +
 +       ​Non-recursive queries can be made via the -r option. Setting this option clears the RD — recursion desired — bit in the query
 +       which host makes. This should mean that the name server receiving the query will not attempt to resolve name. The -r option
 +       ​enables host to mimic the behavior of a name server by making non-recursive queries and expecting to receive answers to those
 +       ​queries that are usually referrals to other name servers.
 +
 +       By default, host uses UDP when making queries. The -T option makes it use a TCP connection when querying the name server. TCP
 +       will be automatically selected for queries that require it, such as zone transfer (AXFR) requests.
 +
 +       The -4 option forces host to only use IPv4 query transport. The -6 option forces host to only use IPv6 query transport.
 +
 +       The -t option is used to select the query type.  type can be any recognized query type: CNAME, NS, SOA, SIG, KEY, AXFR, etc. When
 +       no query type is specified, host automatically selects an appropriate query type. By default, it looks for A, AAAA, and MX
 +       ​records,​ but if the -C option was given, queries will be made for SOA records, and if name is a dotted-decimal IPv4 address or
 +       ​colon-delimited IPv6 address, host will query for PTR records. If a query type of IXFR is chosen the starting serial number can
 +       be specified by appending an equal followed by the starting serial number (e.g. -t IXFR=12345678).
 +
 +       The time to wait for a reply can be controlled through the -W and -w options. The -W option makes host wait for wait seconds. If
 +       wait is less than one, the wait interval is set to one second. When the -w option is used, host will effectively wait forever for
 +       a reply. The time to wait for a response will be set to the number of seconds given by the hardware'​s maximum value for an
 +       ​integer quantity.
 +
 +       The -s option tells host not to send the query to the next nameserver if any server responds with a SERVFAIL response, which is
 +       the reverse of normal stub resolver behavior.
 +
 +       The -m can be used to set the memory usage debugging flags record, usage and trace.
 +
 +IDN SUPPORT
 +       If host has been built with IDN (internationalized domain name) support, it can accept and display non-ASCII domain names. ​ host
 +       ​appropriately converts character encoding of domain name before sending a request to DNS server or displaying a reply from the
 +       ​server. If you'd like to turn off the IDN support for some reason, defines the IDN_DISABLE environment variable. The IDN support
 +       is disabled if the variable is set when host runs.
 +
 +FILES
 +       /​etc/​resolv.conf
 +
 +SEE ALSO
 +       ​dig(1),​ named(8).
 +
 +COPYRIGHT
 +       ​Copyright © 2004, 2005, 2007-2009 Internet Systems Consortium, Inc. ("​ISC"​)
 +       ​Copyright © 2000-2002 Internet Software Consortium.
 +
 +
 +
 +BIND9                                                         Jun 30, 2000                                                       ​HOST(1)
 +
 +</​code>​
  
  • man_de_host.txt
  • Dernière modification: 2016/03/30 15:33
  • (modification externe)