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Date: Wed, 06 Aug 1997 02:24:49 -0700
From: Nadav Eiron <nadav@barcode.co.il>
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To: Simon Lindgren <simon@lindgren.no>
CC: freebsd-questions@FreeBSD.ORG
Subject: Re: Short upgrade question
References: <199708060034.KAA00556@freebie.lemis.com>
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Greg Lehey wrote:
> 
> Simon Lindgren writes:
> > When I upgrade from 2.1.6 to 2.2.2 - will there be an issue of a lot of
> > old files from 2.1.6 filling the drives, that are not used by 2.2.2 ?
> 
> Well, the danger exists that some might get left over, but I don't
> think they'll fill up the disks unless you are *very* tight on space.
> Most of the new files have the same names as the old ones.
> 
> > If yes, what files can I delete to save room?
> 
> This is a non-trivial task.  The best thing you can do is use 'ls -l'
> to list information on all the files before installation, then do the
> same after installation, identify the files which haven't changed, and
> decide whether they're needed or not.  Definitely not an easy thing to
> do.  Most people, myself included, live with the ballast of old files
> hanging around.

One weel-known(?) exception to Greg's comments:
Many of the files under /usr/src changed location between 2.1 and 2.2.
If you indeed installed the sources, you'll be left with both the old
and new versions. The easiest cure is to save your kernel config file
somewhere safe and then delete the whole /usr/src tree prior to
upgrading. This could save about 50MB (if I recall correctly, I maybe
wrong here about the amount...)

> 
> Greg
Nadav