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From: Phillip Lord <p.lord@russet.org.uk>
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Subject: Re: how to refresh buffer
Date: 15 Sep 2004 13:15:06 +0100
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>>>>> "Rokia" == Rokia  <Rokiadd@yahoo.com.cn.discuss> writes:

  Rokia> the file associated to current buffer has been modified
  Rokia> outside.  How can I reload the file?

 
M-x revert-buffer

Also auto-revert-mode will do this automatically. 

Phil