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From: Phillip Lord <p.lord@russet.org.uk>
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Subject: Re: re-read an opened file...
Date: 01 Oct 2002 14:39:25 +0100
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>>>>> "Roland" == Roland Reichenberg <r.reichenberg@gmx.de> writes:

  Roland> Hi everybody,

  Roland> does anybody know how to re-read an already opened file?

  Roland> If another process has changed the contents of the file that
  Roland> I have already opened before, how can I make emacs to read
  Roland> again the newest source of the file?

M-x revert-buffer

or try and edit the buffer and emacs will ask you about it. 

Also see "auto-revert-mode" which is, er, a mode which reverts
automatically. 

Cheers


Phil