Is a tool available to check the integrity of copied files?

[Colin Law]

On Sat, 15 Apr 2023 at 03:20, Little Girl <littlergirl at gmail.com> wrote:

> Probably any of the many backup tools out there could do it. What
> you'd do is create a backup of one of the copies of the files and
> then use the backup program to compare that with another copy
> elsewhere by doing a dry run. It would list off everything that's
> different or missing or new. My backup program of choice is Grsync
> and I know it could do it, because it gives me just such a report
> every week before I run my backups.

If the OS has a cached version of the file then I believe that when
the backup program asks the OS to read the file it will be given the
cached version, just the same as any other program such as diff. So
again that would not prove that the file has been successfully written
to the stick.

Colin