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diff --git a/doc/man/host.1in b/doc/man/host.1in new file mode 100644 index 0000000..0747ded --- /dev/null +++ b/doc/man/host.1in @@ -0,0 +1,182 @@ +.\" Man page generated from reStructuredText. +. +. +.nr rst2man-indent-level 0 +. +.de1 rstReportMargin +\\$1 \\n[an-margin] +level \\n[rst2man-indent-level] +level margin: \\n[rst2man-indent\\n[rst2man-indent-level]] +- +\\n[rst2man-indent0] +\\n[rst2man-indent1] +\\n[rst2man-indent2] +.. +.de1 INDENT +.\" .rstReportMargin pre: +. RS \\$1 +. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin] +. nr rst2man-indent-level +1 +.\" .rstReportMargin post: +.. +.de UNINDENT +. RE +.\" indent \\n[an-margin] +.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]] +.nr rst2man-indent-level -1 +.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]] +.in \\n[rst2man-indent\\n[rst2man-indent-level]]u +.. +.TH "HOST" "1" "@RELEASE_DATE@" "@BIND9_VERSION@" "BIND 9" +.SH NAME +host \- DNS lookup utility +.SH SYNOPSIS +.sp +\fBhost\fP [\fB\-aACdlnrsTUwv\fP] [\fB\-c\fP class] [\fB\-N\fP ndots] [\fB\-p\fP port] [\fB\-R\fP number] [\fB\-t\fP type] [\fB\-W\fP wait] [\fB\-m\fP flag] [ [\fB\-4\fP] | [\fB\-6\fP] ] [\fB\-v\fP] [\fB\-V\fP] {name} [server] +.SH DESCRIPTION +.sp +\fBhost\fP 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, \fBhost\fP prints a short summary of its +command\-line arguments and options. +.sp +\fBname\fP 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 \fBhost\fP by default performs a reverse lookup for that address. +\fBserver\fP is an optional argument which is either the name or IP +address of the name server that \fBhost\fP should query instead of the +server or servers listed in \fB/etc/resolv.conf\fP\&. +.SH OPTIONS +.INDENT 0.0 +.TP +.B \fB\-4\fP +This option specifies that only IPv4 should be used for query transport. See also the \fB\-6\fP option. +.TP +.B \fB\-6\fP +This option specifies that only IPv6 should be used for query transport. See also the \fB\-4\fP option. +.TP +.B \fB\-a\fP +The \fB\-a\fP (\(dqall\(dq) option is normally equivalent to \fB\-v \-t ANY\fP\&. It +also affects the behavior of the \fB\-l\fP list zone option. +.TP +.B \fB\-A\fP +The \fB\-A\fP (\(dqalmost all\(dq) option is equivalent to \fB\-a\fP, except that RRSIG, +NSEC, and NSEC3 records are omitted from the output. +.TP +.B \fB\-c class\fP +This option specifies the query class, which can be used to lookup HS (Hesiod) or CH (Chaosnet) +class resource records. The default class is IN (Internet). +.TP +.B \fB\-C\fP +This option indicates that \fBnamed\fP should check consistency, meaning that \fBhost\fP queries the SOA records for zone +\fBname\fP 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. +.TP +.B \fB\-d\fP +This option prints debugging traces, and is equivalent to the \fB\-v\fP verbose option. +.TP +.B \fB\-l\fP +This option tells \fBnamed\fP to list the zone, meaning the \fBhost\fP command performs a zone transfer of zone +\fBname\fP and prints out the NS, PTR, and address records (A/AAAA). +.sp +Together, the \fB\-l \-a\fP options print all records in the zone. +.TP +.B \fB\-N ndots\fP +This option specifies the number of dots (\fBndots\fP) that have to be in \fBname\fP for it to be +considered absolute. The default value is that defined using the +\fBndots\fP statement in \fB/etc/resolv.conf\fP, or 1 if no \fBndots\fP statement +is present. Names with fewer dots are interpreted as relative names, +and are searched for in the domains listed in the \fBsearch\fP or +\fBdomain\fP directive in \fB/etc/resolv.conf\fP\&. +.TP +.B \fB\-p port\fP +This option specifies the port to query on the server. The default is 53. +.TP +.B \fB\-r\fP +This option specifies a non\-recursive query; setting this option clears the RD (recursion +desired) bit in the query. This means that the name server +receiving the query does not attempt to resolve \fBname\fP\&. The \fB\-r\fP +option enables \fBhost\fP to mimic the behavior of a name server by +making non\-recursive queries, and expecting to receive answers to +those queries that can be referrals to other name servers. +.TP +.B \fB\-R number\fP +This option specifies the number of retries for UDP queries. If \fBnumber\fP is negative or zero, +the number of retries is silently set to 1. The default value is 1, or +the value of the \fBattempts\fP option in \fB/etc/resolv.conf\fP, if set. +.TP +.B \fB\-s\fP +This option tells \fBnamed\fP \fInot\fP 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. +.TP +.B \fB\-t type\fP +This option specifies the query type. The \fBtype\fP argument can be any recognized query type: +CNAME, NS, SOA, TXT, DNSKEY, AXFR, etc. +.sp +When no query type is specified, \fBhost\fP automatically selects an +appropriate query type. By default, it looks for A, AAAA, and MX +records. If the \fB\-C\fP option is given, queries are made for SOA +records. If \fBname\fP is a dotted\-decimal IPv4 address or +colon\-delimited IPv6 address, \fBhost\fP queries for PTR records. +.sp +If a query type of IXFR is chosen, the starting serial number can be +specified by appending an equals sign (=), followed by the starting serial +number, e.g., \fB\-t IXFR=12345678\fP\&. +.TP +.B \fB\-T\fP; \fB\-U\fP +This option specifies TCP or UDP. By default, \fBhost\fP uses UDP when making queries; the +\fB\-T\fP option makes it use a TCP connection when querying the name +server. TCP is automatically selected for queries that require +it, such as zone transfer (AXFR) requests. Type \fBANY\fP queries default +to TCP, but can be forced to use UDP initially via \fB\-U\fP\&. +.TP +.B \fB\-m flag\fP +This option sets memory usage debugging: the flag can be \fBrecord\fP, \fBusage\fP, or +\fBtrace\fP\&. The \fB\-m\fP option can be specified more than once to set +multiple flags. +.TP +.B \fB\-v\fP +This option sets verbose output, and is equivalent to the \fB\-d\fP debug option. Verbose output +can also be enabled by setting the \fBdebug\fP option in +\fB/etc/resolv.conf\fP\&. +.TP +.B \fB\-V\fP +This option prints the version number and exits. +.TP +.B \fB\-w\fP +This option sets \(dqwait forever\(dq: the query timeout is set to the maximum possible. See +also the \fB\-W\fP option. +.TP +.B \fB\-W wait\fP +This options sets the length of the wait timeout, indicating that \fBnamed\fP should wait for up to \fBwait\fP seconds for a reply. If \fBwait\fP is +less than 1, the wait interval is set to 1 second. +.sp +By default, \fBhost\fP waits for 5 seconds for UDP responses and 10 +seconds for TCP connections. These defaults can be overridden by the +\fBtimeout\fP option in \fB/etc/resolv.conf\fP\&. +.sp +See also the \fB\-w\fP option. +.UNINDENT +.SH IDN SUPPORT +.sp +If \fBhost\fP has been built with IDN (internationalized domain name) +support, it can accept and display non\-ASCII domain names. \fBhost\fP +appropriately converts character encoding of a domain name before sending +a request to a DNS server or displaying a reply from the server. +To turn off IDN support, define the \fBIDN_DISABLE\fP +environment variable. IDN support is disabled if the variable is set +when \fBhost\fP runs. +.SH FILES +.sp +\fB/etc/resolv.conf\fP +.SH SEE ALSO +.sp +\fBdig(1)\fP, \fBnamed(8)\fP\&. +.SH AUTHOR +Internet Systems Consortium +.SH COPYRIGHT +2023, Internet Systems Consortium +.\" Generated by docutils manpage writer. +. |