Host Command--linux command to apply a large dictionary 729 commands interpretation

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Host command

use the host command to perform DNS lookups for domain name resolution.

Command syntax:

Host [ option ] [ name ] [ server ]

The meanings of the options in the command are as follows is shown.

Table host command option meaning

Options	Meaning
-A	equivalent to-v-t any
-C	on the authoritative domain name server, compare the SOA Records
-L	list all hosts within a domain, using the AXFR
-R	Disable recursive processing
-T < ';	Specifies the type of query, which can be cname Ns" soa a PTR
-T	enabled TCP/IP mode
-V	Output details
-W	Specify to wait for a reply permanently
-W < duration >	Specify how long it takes to wait for a reply
-4	Use only IPv4 querying things
-6	Use only IPv6 querying things
-R < retry attempts >	Specify UDP Packet retry attempts

Example : Resolves a record rhel.sh.com in the sh.com zone.

[Email protected]~] #host rhel.sh.com

Rhel.sh.comhas address 192.168.0.2

Example : resolves PTR record 192.168.0.2 in the 0.168.192.in-addr.arpa zone.

[[Email protected]~]# host 192.168.0.2

2.0.168.192.in-addr.arpadomain name Pointer rhel.sh.com.

Example : Resolves SOA records in the sh.com zone .

[[Email protected]~]# host-t SOA sh.com

Sh.com Hassoa record rhel.sh.com. root.sh.com. 1268360234 10800 3600 604800 38400

Example : Resolves NS records in the sh.com zone .

[Email protected] linux~]# host-t NS sh.com

sh.com nameserver rhel.sh.com.

Example : Resolves MX records in the sh.com zone .

[Email protected] linux~]# host-t MX sh.com

Sh.com Mailis handled by ten mail.sh.com.

Example : Resolves all host records in the sh.com zone.

[Email protected] linux~]# host-l sh.com 192.168.0.2

Using Domainserver:

name:192.168.0.2

address:192.168.0.2#53

Aliases:

sh.com nameserver rhel.sh.com.

Rhel.sh.comhas address 192.168.0.2

Linux.sh.comhas address 192.168.0.5

Example : Resolves the details of A record in the sh.com zone.

[Email protected] linux~]# host-a rhel.sh.com

Trying "Rhel.sh.com"

;; ->>header<<-opcode:query, Status:noerror, id:44664

;; Flags:qraa Rd RA; Query:1, Answer:1, Authority:1, additional:0

;; Questionsection:

; rhel.sh.com. In any

;; Answersection:

rhel.sh.com. 38400 in A 192.168.0.2

;; Authoritysection:

sh.com. 38400 in NS rhel.sh.com.

Received 59bytes from 192.168.0.2#53 in 1 ms

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Host Command--linux command to apply a large dictionary 729 commands interpretation