dig references

The dig command uses the following syntax:

dig [domain] [q-type]    [q-class]   [q-opt]     [global-d-opt]

domain

The [domain] parameter specifies the domain to dig:

dig google.com

q-type

The [q-type] parameter specifies the DNS query type. By default, the query type is A for Host addressspecified.

Here is an example of a command that will dig NS queries for Authoritative name serverin google.com:

dig google.com NS

DNS query types

The list of DNS query types are:

q-class

The [q-class] parameter specifies the class of the query. By default, the query class is IN for Internet.

Other commonly used query classes are HS for Hesiodand CH for CHAOSNETrecords.

Here is an example of a command that specifies the CH class query type:

dig google.com CH

q-opt

The {q-opt} can be used to insert the query options. Multiple query options can be included.

The table below shows the list of options for {q-opt}:

global-d-opt

The {global-d-opt} can be used to insert the global query options. Multiple query options can be included.

The use of {global-d-opt} affect all queries.

The table below shows the list of options for {global-d-opt}:

Help

To print the help page of dig, use:

dig -h

Version

To print the version of dig, use:

dig -v