[pferde]

I wonder how they grab contents of DNS cache in Linux client - if they even do that.

[pfg]

I think Ubuntu doesn't do any DNS caching by default (unless you manually install something like dnsmasq), so they probably figured it's not really useful on that platform.

[fragmede]

dnsmasq is installed on ubuntu by default since 12.04

[pfg]

Thanks, must've missed that!

Apparently caching isn't enabled though[1].

[1]: http://www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/