HI,
Camelot has the command. You need to open Terminal. (Applications/Utilities)
Launch Terminal. It should open a bash window for you.
You can copy/paste Camelot's command right into the Terminal window, then hit Return on your keyboard and that's all there is to it.
Don't forget to quit Terminal.
More info here.
http://infosonic.wordpress.com/2008/02/16/os-x-flush-dns-cache/
Help for the hundreds of UNIX tools and commands available in Mac OS X is available in the Terminal utility. To learn how to use a command, refer to the command’s “man” (manual) page.
Open Terminal, and enter “man” and the name of the command.
Open Terminal
As a simple example, to learn about the uptime command, enter the following in Terminal:
man uptime
Press the Space bar to display the next page, or type Q to quit.
For information about using man to display manual pages in Terminal, enter “man man”. For information about viewing text in Terminal, enter “man more”.
Carolyn 🙂