Replace character with accent by character without accent

From: .:: Evanescence ::. (evanescence_br_at_pop.com.br)
Date: 08/30/04 

Date: 30 Aug 2004 00:49:08 GMT

Hello people.

I have file coming from a system that is in Portuguese, and I need to
strip it of all characters that have accent.

example:

á -> a
è -> e
ç -> ç

you get the idea.

Question: How do I do that with a UNIX shell script?

My shell is the BASH shell. I have some knowledge of how to make shell
script.

Thank you. 

-- 
.:: Evanescence ::. Porto Alegre, RS, Brazil
"The words have been drained from this pencil
  Sweet words that I want to give you
  And I cant sleep, I need to tell you... goodnight."
       -- Evanescence, 'You'

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