Dig Command Options and Examples

Dig Command Options and Examples

+ [No] query using TCP or without TCP

+ [No] VC provides options for compatibility with earlier versions. The same role as TCP options. VC stands for "virtual circuit"

+ [No] Ignore ignores the truncated UDP return package, instead of using a TCP connection to retry. By default, TCP connections are used for retry.

+ [No] nssearch queries the authorization resolution server records containing the domain name information, and displays the SOA record items in the domain name records of each server.

+ [No] Trace enables domain name authorization chain tracking. Disabled by default. After the DNS is enabled, the parser starts from the root domain name and initiates a domain name resolution query step by step based on the returned domain name NS record information and displays the results.

Example:

Query in TCP mode:

Dig oschina.net + TCP

Query SOA records:

Dig oschina.net + nssearch

Step-by-Step query from the root domain name:

Dig oschina.net + trace

Specify query record items:

Dig oschina.net type

Type can be a, AAAA, any, MX, NS, SOA, and other standard record items. If not specified, a record is queried by default.

Example:

Query a records:

Dig oschina.net

Query any records:

Dig oschina.net any

Query MX records:

Dig oschina.net MX

DNS server used for query

Dig @ server name

Example: Dig @ 114.114.114.114 oschina.net

Dig @ ns1.dnsv2.com oschina.net

Reverse DNS query

Dig-x 202.108.22.220

Reference: http://linux.die.net/man/1/dig

Dig Command Options and Examples