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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 reply in more user-readable form. For more advanced DNS queries use kdig instead.

Parameters

Is a domain name that is to be looked up. If the name is IPv4 or IPv6 address the PTR query type is used.
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.
Send ANY query with verbose mode.
Enable debug messages.
Print the program help.
Disable recursion.
Use the TCP protocol.
Enable verbose output.
Print the program version. The option -VV makes the program print the compile time configuration summary.
Wait forever for the reply.
Set the query class (e.g. CH, CLASS4). The default class is IN.
Set the query type (e.g. NS, IXFR=12345, TYPE65535). The default is to send 3 queries (A, AAAA and MX).
The number (>=0) of UDP retries to query a nameserver. The default is 1.
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 indicates 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 Labs <https://www.knot-dns.cz>

COPYRIGHT

Copyright 2010–2024, CZ.NIC, z.s.p.o.

2024-10-14 3.4.1