dig命令

dig @{ns1.example.com} {example.com}
dig @{ns1.example.com} {example.com} {TYPE}
dig cyberciti.biz a
dig cyberciti.biz mx
dig cyberciti.biz ns
dig cyberciti.biz txt
dig @ns1.nixcraft.net cyberciti.biz a

其他:

$ dig +trace cyberciti.biz          # Task: Trace Usage
$ dig +short cyberciti.biz          # Task: Get Only Short Answer
$ dig +noall +answer cyberciti.biz any      # Task: Display All Records
$ dig -x +short {IP-Address-here}           # Task: Reverse IP Lookup
$ dig +nssearch cyberciti.biz               # Task: Find Domain SOA Record
$ dig +nocmd +noall +answer {TYPE} {example.com}    # Task: Find Out TTL Value Using dig
    dig www.zhaoweiguo.com +nocomments +nocmd
    // +trace可查看更详细信息

    dig +trace  @8.8.8.8 www.baidu.com A

    简化命令:
    +nocmd
    +short
    +nocomment
    +nostat

dig 全称Domain Information Groper

实例:

dig @8.8.8.8 www.baidu.com A

正常结果:

~ dig @8.8.8.8 www.baidu.com A

; <<>> DiG 9.10.6 <<>> @8.8.8.8 www.baidu.com A
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12823
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.baidu.com.         IN  A

;; ANSWER SECTION:
www.baidu.com.      80  IN  CNAME   www.a.shifen.com.
www.a.shifen.com.   112 IN  A   180.97.33.108
www.a.shifen.com.   112 IN  A   180.97.33.107

;; Query time: 58 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon May 07 23:14:21 CST 2018
;; MSG SIZE  rcvd: 101

错误结果:

~ dig @8.8.8.8 www.baidu.com1 A

; <<>> DiG 9.10.6 <<>> @8.8.8.8 www.baidu.com1 A
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 44290
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.baidu.com1.            IN  A

;; AUTHORITY SECTION:
.           86392   IN  SOA a.root-servers.net. nstld.verisign-grs.com. 2018050700 1800 900 604800 86400

;; Query time: 49 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon May 07 23:16:30 CST 2018
;; MSG SIZE  rcvd: 118