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Re: how to view config file changes without running an upgrade?

On Wed, Mar 21, 2018 at 09:56:09AM -0500, David Wright wrote:
> If you unpack the package somewhere, either using ar etc or,
> more easily, by selecting it in mc and copying CONTENTS into,
> say, /tmp

Or "dpkg -x".

> $ for j in $(dpkg -L packagename) ; do [ -f $j ] && diff -u $j /tmp/CONTENTS/$j ; done

This only works if the filenames contained in the package are "safe",
not containing any whitespace characters or ? or * or [ or any other
characters that a shell may interpret as part of word splitting or
filename expansion (with or without extended globs enabled).


For most Debian packages, the filenames probably are "safe", but relying
on that is not a good habit to fall into.

dpkg -L packagename | while IFS= read -r f; do [ -f "$f" ] && diff -u "$f" /tmp/CONTENTS/"$f"; done

That's safe for all filenames that don't contain newlines.  And I'm
pretty sure a filename with a newline cannot occur in a package, because
all of the tools like dpkg -L would break.  In any case, dpkg -L would
*definitely* break, so you wouldn't be able to do this at all.