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How to Flush the Local DNS Cache

When URLs are just not resolving the way you want, to time to clear or flush the DNS nameserver local cache – enter the relevant command in the Terminal/command line for the operating system you are on.

macOS Mojave 10.14.0

sudo killall -HUP mDNSResponder;say DNS cache has been flushed

or

sudo killall -HUP mDNSResponder, sleep 2, echo macOS DNS Cache Reset | say

macOS High Sierra 10.13.0

sudo killall -HUP mDNSResponder;say DNS cache has been flushed

macOS Sierra 10.12.0

sudo killall -HUP mDNSResponder;say DNS cache has been flushed

OSX 10.11.0

sudo killall -HUP mDNSResponder

OSX 10.10.4

sudo killall -HUP mDNSResponder

OSX 10.10.0 – 10.10.3

sudo discoveryutil mdnsflushcache

OSX 10.9  – 10.8 – 10.7

sudo killall -HUP mDNSResponder

OSX 10.5 – 10.6

sudo dscacheutil -flushcache

Windows

ipconfig /flushdns

Linux (depending on what you’re running)

/etc/init.d/named restart

/etc/init.d/nscd restart

 

 

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  1. Jed Krisch

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