How to flush DNS cache

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