Surf 11 » Flush DNS Cache on Mac OSX

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August 02, 2005

Need to flush the DNS cache on your Mac OS X computer? Run the following command:

sudo lookupd -flushcache

Via MacTips

More about lookupd

The lookupd daemon acts as an information broker and cache. It is called by various routines in the System framework to find information about user accounts, groups, printers, e-mail aliases and distribution lists, computer names, Internet addresses, and several other kinds of informa-information. tion.

lookupd keeps a cache of recently requested items to improve system per-performance. formance. It also implements a search strategy used to find information from the many information sources that are potentially available to a computer. These include the Domain Name System (DNS), Sun Microsystem's Network Information Services (NIS), Apple's NetInfo system, and a set of files found in the /etc directory. lookupd also has a channel to query Directory Services, allowing access to data from LDAP and other directory systems.

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Comments

On at diz wrote:

I don't think that sudo is required.

On at Jay wrote:

I agree; sudo is unneccessary.

On at b wrote:

how do you input the dns cache flush command on a mac? On a PC you do start>run> etc. What is the equivalent of that on a mac?

On at xurizaemon wrote:

@b - open a terminal window (Terminal.app is in /Applications/Utilities). there are other methods to execute a command, but this is the most basic.

On at xurizaemon wrote:

also: the Leopard (10.5) version of this command is "dscacheutil -flushcache"