How do I flush the DNS cache on a OS X 10.6 machine?

Question

Trying to flush the local DNS cache. How is this done on Snow Leopard?

Using System Preferences and using the terminal?

score 17 · Accepted Answer · edited Oct 25 '15 at 20:50

17

Use

sudo dscacheutil -flushcache

or

sudo killall -HUP mDNSResponder

In 10.6 the handling of Unicast DNS is now managed by mDNSResponder - dscacheutil -flushcache now just tells mDNSResponder to restart (the second command above).

edited Oct 25 '15 at 20:50

the

1,335

answered Sep 09 '10 at 22:21

Chealion

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2

See OS X: How to reset the DNS cache from the Apple support pages. – Joel Purra Jul 08 '13 at 09:10

score 9 · Answer 2 · answered Sep 09 '10 at 20:30

9

dscacheutil -flushcache

answered Sep 09 '10 at 20:30

ghoppe

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can it be done via pref pane? – jdiaz Sep 09 '10 at 20:34
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@jdiaz No. There is no option in System Preferences to flush the DNS cache. – ghoppe Sep 09 '10 at 21:28
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After I upgraded to OS X Lion, dscacheutil -flushcache does not seem to work anymore on my system. Using Chealion's suggestion of sending a HUP signal to mDNSResponder does still work for me though. – Aug 05 '11 at 11:47

How do I flush the DNS cache on a OS X 10.6 machine?

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