Docu review done: Mon 03 Jul 2023 17:05:07 CEST

Table of Content

Setup

$ apt install bind9

To interact with the cache of bind9/named you will use the binary rndc.

To dump the cache, use the parameter dumpdb -cache for rndc

$ rndc dumpdb -cache

This will return no output, but it will create a file with path /var/cache/bind/named_dump.db

This file can be opend with any fileviewer you like hust,vim,hust ;) or of course parsed with grep, sed, …

If you know the record name you can also just flush the cache only for the specific record like this:

$ rndc flushname <recordname>

Or if you want to flush also all records below that name, you can use this:

$ rndc flushtree <recordname>

A sample for the above mentioned comments:

$ rndc flushname google.at
$ rndc flushtree google.at

To flush the cache of bind, who would expect it coming, just flush it

$ rndc flush

But now you should reload the data ;)

$ rndc reload

If everything is fine, you should see the words server reload successful