UNIX command to format or delete all content on Flash Drive

Need a unix command that will allow me to quickly remove all contents or format a flash drive.
Computers will be OS X based and I would have to batch process them.
I'm just looking for the command itself, then my other guys can automate them
Thanks

Hi Mihalis,
   The second of your commands has a risk of failure because some of the directories may not be empty when the attempt is made to delete them. The problem isn't that the command won't try to delete all directories. The problem is that it tries to delete higher level directories before the directories they contain. A depth-first search will remedy that problem. Thus, I recommend the following form of the command:
find -d /Volumes/Flash -type d -exec rmdir {} \;
or
find -d /Volumes/Flash -type d -delete
Gary
~~~~
   A straw vote only shows which way the hot air blows.
         -- O'Henry

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