June 2004
Intermediate to advanced
1056 pages
39h 58m
English
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Name
dig
Synopsis
dig [@server]host[querytype] [queryclass] [options]
Queries Internet domain name servers. Like the
nslookup command, dig displays
information about host as returned by the
default or a specified name server. With dig, you
specify all aspects of the query on the command line;
there’s no interactive mode as with
nslookup.
Specify the name server to query with
@
server, using either a
domain name or an IP in server. The
default is to query the name servers in
resolv.conf. Specify the type of query in
querytype; the default is to look up
address records. The supported types are:
-
A Host’s Internet address
-
ANY Any available information (default)
-
AXFR Request zone transfer
-
HINFO Host CPU and operating system type
-
MX Mail exchanger
-
NS Nameserver for the named zone
-
SOA Domain start-of-authority
Use queryclass to specify query class of
either IN (Internet) or ANY.
Default is IN.
Options
The following descriptions cover
dig’s basic operation; for a
complete description, refer to
dig’s manpage.
-
-xaddress Reverse map
address, which allows you to locate a hostname when only an IP number is available. Implies ANY as the query type.-
-pport Send queries to the specified port instead of port 53, the default.
-
+norec[urse] Turn off recursion (on by default).
-
+vc Send TCP-based queries (queries are UDP by default).
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.