How to Flush DNS cache in Mac OS X
If you’re a systems administrator or a web developer, chances are you’ll have to flush your DNS cache every once in a while to get things straightened out serverside. Flushing your DNS cache in Mac OS X is actually really easy, and there are two different commands to use, one for Leopard and for Tiger. Depending on your version of OS X, open your Terminal and follow the appropriate directions below:
Flush DNS Cache in Mac OS X 10.5, Mac OS X 10.6, or OS X 10.7 Lion
Launch Terminal and issue the following command:
dscacheutil -flushcache
All done, your DNS has been flushed. On a side note, the dscacheutil is interesting in general and worth taking a look at, try the -statistics flag instead for some stats.
Flush your DNS Cache in Mac OS X 10.4 Tiger
Type the following command in the Terminal:
lookupd -flushcache
That’s it, that’s all there is to it. Now your DNS settings should be as you intended them to be.
thank you very much for this article, I wanted to ask you please how can erase our dns cache?
Does this function still work? I’ve changed my nameservers on a site I own and it’s been hours and I’m still getting the old results… I’ve tried flushing the dns and it’s still not working.
As of today, the command works perfectly. Thank you.
Once I enter the command into Terminal, does any confirmation script appear to confirm the cache has been cleared?