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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>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Utility to change a byte in a binary file?
Message-ID:  <20070809220254.GA81490@gizmo.acns.msu.edu>
In-Reply-To: <W896404648215141186691117@webmail30>
References:  <W896404648215141186691117@webmail30>

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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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