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.. highlight:: console
``khost`` – Simple DNS lookup utility
=====================================
Synopsis
--------
:program:`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 :doc:`kdig<man_kdig>`
instead.
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 :file:`/etc/resolv.conf` are used.
If no arguments are provided, :program:`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.
**-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 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
-----
:file:`/etc/resolv.conf`
See Also
--------
:manpage:`kdig(1)`, :manpage:`knsupdate(1)`.
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