I saw that someone already gave the answer to add -rf to the rm command.
While that answers your question, it's rather short.

To answer in full: you can't delete a non-empty directory. You first 
need to delete all files within the directory before you can remove the 
directory itself.

And that's what the switches -rf will help you do.

	Johnny

Xianwen Chen wrote:
> How to delete a non-empty directory?
> 
> --
> Xianwen Chen
> College Of Economics And Trades,Shanghai Fishiries University
> Shanghai,China
> 086-21-68022471
> apple45@gmail.com

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt@update.uu.se           ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol