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KHOST(1) Knot DNS KHOST(1) NAME khost - Simple DNS lookup utility SYNOPSIS khost [options] name [server] DESCRIPTION This utility sends a DNS query for the name to the server and prints a re- ply in more user-readable form. For more advanced DNS queries use kdig in- stead. Parameters name Is a domain name that is to be looked up. If the name is IPv4 or IPv6 address the PTR query type is used. server Is a name or an address of the nameserver to send a query to. The address can be specified using [address]:port notation. If no server is specified, the servers from /etc/resolv.conf are used. If no arguments are provided, khost prints a short help. Options -4 Use the IPv4 protocol only. -6 Use the IPv6 protocol only. -a Send ANY query with verbose mode. -d Enable debug messages. -h, --help Print the program help. -r Disable recursion. -T Use the TCP protocol. -v Enable verbose output. -V, --version Print the program version. The option -VV makes the program print the compile time configuration summary. -w Wait forever for the reply. -c class Set the query class (e.g. CH, CLASS4). The default class is IN. -t type Set the query type (e.g. NS, IXFR=12345, TYPE65535). The default is to send 3 queries (A, AAAA and MX). -R retries The number (>=0) of UDP retries to query a nameserver. The default is 1. -W wait The time to wait for a reply in seconds. This timeout applies to each query try. The default is 2 seconds. EXIT VALUES Exit status of 0 means successful operation. Any other exit status indi- cates an error. EXAMPLES 1. Get the A, AAAA and MX records for example.com: $ khost example.com 2. Get the reverse record for address 192.0.2.1: $ khost 192.0.2.1 3. Perform a verbose zone transfer for zone example.com: $ khost -t AXFR -v example.com FILES /etc/resolv.conf SEE ALSO kdig(1), knsupdate(1). AUTHOR CZ.NIC, z.s.p.o. and contributors <https://www.knot-dns.cz/> COPYRIGHT Copyright (C) CZ.NIC, z.s.p.o. and contributors 3.5.6 2026-07-20 KHOST(1)
NAME | SYNOPSIS | DESCRIPTION | EXIT VALUES | EXAMPLES | FILES | SEE ALSO | AUTHOR | COPYRIGHT
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