How to clear DNS cache on a mac running OSX

Clearing the cache on Mac’s seems to change with every other release these days. In all cases though you need to use Terminal, but not always the same command. Back in the 10.4 days you would use lookupd, then in 10.5 and 10.6 you would use dscacheutil, but now in 10.7 you need to now use a killall command.

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