How to flush DNS cache in Linux / Windows / Mac

To flush DNS cache in Microsoft Windows (Win XP, Win ME, Win 2000, Win 98):-

- Start -> Run -> type cmd
- in command prompt, type ipconfig /flushdns
- Done! You Window DNS cache has just been flush.

To flush the DNS cache in Linux, restart the nscd daemon

- To restart the nscd daemon, type /etc/rc.d/init.d/nscd restart in your terminal
- Once you run the command your linux DNS cache will flush.

To flush the DNS cache in Mac OS X:-

- type lookupd -flushcache in your terminal to flush the DNS resolver cache.
ex: bash-2.05a$ lookupd -flushcache
- Once you run the command your DNS cache (in Mac OS X) will flush.