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Date: Thu, 9 Aug 2007 18:02:54 -0400
From: Jerry McAllister <jerrymc@msu.edu>
To: "V.I.Victor" <idmc_vivr@intgdev.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Utility to change a byte in a binary file?
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On Thu, Aug 09, 2007 at 08:25:17PM +0000, V.I.Victor wrote:

> 
> It sure seems that this should be simple, but my searches have only 
> turned up inter-active hex/disk editors.  I'm probably "asking" wrong.
> 
> I have a large binary file (>700 meg) and I know that there is a 
> single wrong byte.  I also know it's exact location in the file.
> 
> Is there a command-line utility to write a byte at a specified offset 
> into a file? 

You could try 'dd' and manipulate the skip/offset and size arguments.

////jerry

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