On Ubuntu 12.04 I installed BIND9 via `apt-get install`.

I configure the server in a very simple way and it works in name resolution.
Now I'm curious to read (if it's possible) its cache.

Reading the `rndc` manpage I tried to use the `rndc flush view` command, but it says

> 
> rndc: `flush` failed: not found
> 
> 
> 

while if I run simply `rndc flush` it works.

So, first of all, where I can find the BIND9 cache file?

And then, why `rndc flush view` fails?