1KHOST(1)                           Knot DNS                           KHOST(1)
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NAME

6       khost - Simple DNS lookup utility
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SYNOPSIS

9       khost [options] name [server]
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DESCRIPTION

12       This  utility sends a DNS query for the name to the server and prints a
13       reply in more user-readable form. For more  advanced  DNS  queries  use
14       kdig instead.
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16   Parameters
17       name   Is a domain name that is to be looked up. If the name is IPv4 or
18              IPv6 address the PTR query type is used.
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20       server Is a name or an address of the nameserver to send  a  query  to.
21              The  address  can be specified using [address]:port notation. If
22              no server is specified, the servers  from  /etc/resolv.conf  are
23              used.
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25       If no arguments are provided, khost prints a short help.
26
27   Options
28       -4     Use the IPv4 protocol only.
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30       -6     Use the IPv6 protocol only.
31
32       -a     Send ANY query with verbose mode.
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34       -d     Enable debug messages.
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36       -h, --help
37              Print the program help.
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39       -r     Disable recursion.
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41       -T     Use the TCP protocol.
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43       -v     Enable verbose output.
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45       -V, --version
46              Print the program version.
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48       -w     Wait forever for the reply.
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50       -c class
51              Set the query class (e.g. CH, CLASS4). The default class is IN.
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53       -t type
54              Set the query type (e.g. NS, IXFR=12345, TYPE65535). The default
55              is to send 3 queries (A, AAAA and MX).
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57       -R retries
58              The number (>=0) of UDP retries to query a nameserver.  The  de‐
59              fault is 1.
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61       -W wait
62              The time to wait for a reply in seconds. This timeout applies to
63              each query try. The default is 2 seconds.
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EXIT VALUES

66       Exit status of 0 means successful operation. Any other exit status  in‐
67       dicates an error.
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EXAMPLES

70       1. Get the A, AAAA and MX records for example.com:
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72             $ khost example.com
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74       2. Get the reverse record for address 192.0.2.1:
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76             $ khost 192.0.2.1
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78       3. Perform a verbose zone transfer for zone example.com:
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80             $ khost -t AXFR -v example.com
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FILES

83       /etc/resolv.conf
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SEE ALSO

86       kdig(1), knsupdate(1).
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AUTHOR

89       CZ.NIC Labs <https://www.knot-dns.cz>
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92       Copyright 2010–2022, CZ.NIC, z.s.p.o.
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973.2.4                             2022-12-12                          KHOST(1)
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