Comments on: Quick Tip: Clear DNS Cache in Mac OS X

By: dave

dave — Tue, 03 Aug 2010 15:56:46 +0000

The IP got changed on a site I was working with and I tried the command dscacheutil -flushcache it seemed to work but the DNS did not flush. I still cant view the site.

By: Cameron

Cameron — Fri, 23 Jul 2010 06:16:26 +0000

Also have this problem. . and also no idea how to fix it. .

By: Vincent

Vincent — Sun, 06 Jun 2010 07:46:52 +0000

i run dscacheutil -flushcache.. it gives me a “command not found” error

i also tried lookupd -flushcache, “command not found”

i did th whese while running in DVD OS X Leopard.

By: Mac Info » Blog Archive » Čištění DNS cache

Mac Info » Blog Archive » Čištění DNS cache — Tue, 20 Oct 2009 09:19:20 +0000

[...] vyčistit DNS cache, můžete tak učinit pomocí následujícího příkazu (dle vašeho OS): Tiger: lookupd -flushcache Leopard: dscacheutil [...]

By: Liviu Voicu

Liviu Voicu — Sun, 30 Mar 2008 07:50:30 +0000

Hello every one,

I’m having an annoying problem since 3 days, I can not connect to any google domain and a few others (yahoo), using Leopard…
I ran dscacheutil -flushcachel and it didn’t help
Could anyone help me please?

Thanks

By: Gil Bates

Gil Bates — Tue, 12 Feb 2008 08:44:18 +0000

hmills, I happen to use this every day, multiple times a day.

I do web development work and I have a local web server running on my laptop. I have an automator script which swaps my hosts file to point to the “real” site or my local development site with one click. At the end of the script, I clear the DNS cache. That way I can switch back and forth.

By: David

David — Thu, 08 Nov 2007 15:05:29 +0000

Example situation where it might make sense :
Your office server has a domain name (mycompany.com), but the company’s ISP decides to change the IP address associated with your office’s internet connection. For a short while (may be as short as 2 hours, but as long as 2 or more days), all DNS requests for mycompany.com will still resolve to the old IP address (because of caches), thus making the new address totally unreachable by DNS name.

If you clear your local DNS caches, it might then resolve to the new address.

That is unless your ISP doesn’t cache itself the DNS results. In that case, your last resort is to modify your /etc/hosts file to manually override the IP address associated with “mycompany.com”.

By: adh

adh — Sat, 27 Oct 2007 02:58:53 +0000

dscacheutil replaces lookupd in leopard. So it just becomes dscacheutil -flushcachel

By: Dave

Dave — Tue, 16 Oct 2007 21:27:53 +0000

unfortunately no longer in leopard…. :-/

By: Mac Info » Blog Archive » Střípky zajímavostí

Mac Info » Blog Archive » Střípky zajímavostí — Wed, 28 Mar 2007 10:01:56 +0000

[...] Rychlý tip: čištění dns cache lookupd -flushcache zdroj: os x daily [...]

By: hmills

hmills — Sat, 24 Mar 2007 17:22:04 +0000

I don’t think I’ve come across an instance where I would need this, but good to know