Bill Hogan writes (".deb files"):
> At last I have started work on my Debian partition.
>
> Is there an `is-valid' predicate I can apply to `.deb' files
> I download before I install them?
No, not at present. If you have saved the release announcements of
the individual packages you can use `md5sum' to check them, but I
don't expect you to want to do this for a full installation.
Ian.