ホスト名からIPを調べる方法(host, dig)

host -a

ANSWER SECTIONのところにIPが表示される

% host -a stg.sample.com
Trying "stg.sample.com"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21689
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;stg.sample.com.  IN ANY

;; ANSWER SECTION:
stg.sample.com.   300 IN A 172.26.21.67

Received 80 bytes from 100.32.220.102#53 in 22 ms

dig

こちらもANSWER SECTIONの所にIPが表示される

% dig stg.sample.com                                                                        

; <<>> DiG 9.10.6 <<>> stg.sample.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22510
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;stg.sample.com.  IN A

;; ANSWER SECTION:
stg.sample.com.   103 IN A 172.26.213.67

;; Query time: 18 msec
;; SERVER: 100.32.220.102#53(100.32.220.102)
;; WHEN: Mon Jun 21 11:33:06 JST 2021
;; MSG SIZE  rcvd: 91