Michael Sullivan wrote:
> Every Sunday I have cron make full backups of the /home directories on
> each of my computers (it's a home network). I then run tar tvf >
> <date>.txt on each tarball and compare it to the tarball from the last
> week, and then delete from the tarball the previous week every
> included file that hasn't changed. I make the comparison by saying
> reset; diff <last-Sunday>.txt <this-Sunday>.txt | grep
> '<directory-name> | grep '<'
> As you can imagine, this can be quite time consuming. Is there an
> easier way to do this? I was thinking either one included in tar that
> would compare the two tarballs and then delete from the old one any
> duplicate files. Or, is there a way to extract only the filenames
> from "diff <last-Sunday>.txt <this-Sunday>.txt | grep
> '<directory-name> | grep '<'" to be included in a script that removes
> filenames without duplicates and then passes to tar for deletion?
Instead of deleting from the previous weeks tarball the files that
haven't changed, why don't you just make this week's include only the
files that have?
tar --after-date
tar --newer
tar --newer-mtime
etc.
--
-jdr-
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