From owner-freebsd-hackers@FreeBSD.ORG  Mon Sep  5 08:55:57 2005
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Date: Mon, 5 Sep 2005 10:56:40 +0200
From: Matthew West <mwest@cs.uct.ac.za>
To: John Nielsen <lists@jnielsen.net>
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Cc: hackers@freebsd.org, Donatas <donatas@lrtc.net>
Subject: Re: kernel.gz.aa  & kernel.gz.ab
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On Fri, Sep 02, 2005 at 08:47:30AM -0400, John Nielsen wrote:
> On Friday 02 September 2005 08:35, Donatas wrote:
> > wonder how could I decompress $subj files....they doesn't seems to be in
> > tar or gzip formats.
> >
> > files are taken from kern1.flp nad kern2.flp on 5.4-RELEASE/floppies
> 
> cat kernel.gz.aa kernel.gz.ab > kernel.gz
> gunzip kernel.gz

You're still missing the first part of the file.

You also need to grab kernel.gz.boot from the boot.flp image.

Then you can do a:

  cat kernel.gz.boot kernel.gz.aa kernel.gz.ab > kernel.gz

Take a look at src/release/scripts/split-file.sh to see how these files are
generated.

Useful if you want to do an install with a custom kernel, without
building a whole release.

-- 
mwest@cs.uct.ac.za