How to clear DNS cache in Windows, Linux, Mac

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by Alex Benko, 2by2host
2011-03-03 16:17:34

DNS cache is something that your computer uses to quickly look up the IP address of for example a web site. There are some situations that will require your to clear your DNS cache in order to get the latest information.

To flush DNS cache in Microsoft Windows (98, 2000, XP, Vista, 7):

  • Go to Start -> Run -> type in cmd
  • from command prompt, type ipconfig /flushdns
  • that will reset your DNS cache

To flush DNS cache on Mac OSX (Leopard):

  • type lookupd -flushcache in the terminal window
  • that will reset your DNS cache

To flush DNS cache on Mac OSX:

  • type dscacheutil -flushcache in your terminal window
  • that will reset your DNS cache

To flush DNS cache on a Linux box you need to restart the nscd service/daemon:

  • type /etc/rc.d/init.d/nscd restart the terminal window
  • that will reset your DNS cache