Flush DNS cache in Leopard

Posted in September 17, 2009 ¬ 08:38h.nioakeim291 Comments »

There is something in leopard and all operating systems that bothered me since i started playing around with ip’s and generaly started being a system admin. How do i flush quick and dirty my machines dns query cache without restarting my network connections? Well in other systems dont know yet, but in leopard i found this great terminal command/application:

DSCACHEUTIL

Take a look at the first rows in man

dscacheutil(1)            BSD General Commands Manual           dscacheutil(1)

NAME
dscacheutil — gather information, statistics and initiate queries to the Directory Service
cache.

SYNOPSIS
dscacheutil -h
dscacheutil -q category [-a key value]
dscacheutil -cachedump [-buckets] [-entries [category]]
dscacheutil -configuration
dscacheutil -flushcache
dscacheutil -statistics

DESCRIPTION
dscacheutil does various operations against the Directory Service cache including gathering
statistics, initiating lookups, inspection, cache flush, etc.  This tool replaces most of the
functionality of the lookupd tool previously available in the OS.

Well if you ever need to flash you dns queries just do:

$ sudo dscacheutil -flushcache

mac osx, , ,

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