clear DNS cache

[Rex Dieter]

Pal, Laszlo (private) wrote:

> After a quick google it seems there is no "central" cache used anymore
> (previously nscd service maintained a central cache, but it is not
> installed by default). If this is installed at you, you may want to
> restart the relevant service
> 
> nscd.x86_64 : A Name Service Caching Daemon (nscd).
> 
> also if-down/if-up may clear the app specific caches

fyi, if using nscd, restarting it does *not* clear its cache.  You need to 
do something like:
nscd --invalidate=hosts

-- Rex