table of contents
| 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¶
- 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 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¶
AUTHOR¶
CZ.NIC Labs <https://www.knot-dns.cz>
COPYRIGHT¶
Copyright 2010–2024, CZ.NIC, z.s.p.o.
| 2024-09-02 | 3.4.0 |