Re: Bug#366780: ITP: summain -- compute and verify file checksums

[Ben Pfaff <blp@cs.stanford.edu>]

Lars Wirzenius <liw@iki.fi> writes:

>  A checksum is a number that identifies the contents of a file: if the
>  contents change, so does the checksum. If you create a checksum before
>  you burn a CD, when you know the files are correct, you can easily
>  check the CD at any time: just compute the checksum again and see if
>  they have changed.
>  .
>  summain computes and checks files against such checksums. It supports
>  both MD5 and SHA-1 checksums, using formats compatible with the md5sum
>  and sha1sum utilities, both for reading and writing. In addition, it
>  can read and verify checksums from Debian .dsc, .changes, and Sources
>  files.

It's not clear to me, from the description, what the program does
that the md5sum and sha1sum utilities do not.
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