How can I flush the DNS Cache? How can I clear my DNS cache on my android phone? (Droid3, Gingerbread, rooted to be specific)

Ideally I'm looking for a command to run through a terminal emulator, something similar to 

ipconfig /flushdns


On a windows machine.

What's the Linux version of this?
Addresses are cached for 600 seconds (10 minutes) by default. Failed lookups are cached for 10 seconds. From everything I've seen, there's nothing built in to flush the cache. This is apparently a reported bug in Android because of the way it stores DNS cache. Clearing the browser cache doesn't touch the DNS, the "hard reset" clears it because it simply times out.

Can we ask the underlying reason for needing to clear the DNS cache? Perhaps there's another solution that's missed because we're not looking at the bigger picture.