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How to flush DNS cache

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Sometimes it's good to know how to flush the DNS cache on your Linux or Windows box. Here is how to do it:

Linux

Restart the nscd daemon. In case it is not installed install it first
 apt-get install nscd  
then type the command
 sudo /etc/init.d/nscd restart  
or
 sudo service nscd restart  
There are a few alternatives to flush the DNS cache under Linux. See this blog posting to get a more complete overview.

Windows

Open a command shell and type
 ipconfig /flushdns  

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