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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: NAS Backup solution?
Date: Mon, 23 Jun 2025 08:07:03 -0000 (UTC)
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On Mon, 23 Jun 2025 08:45:36 +0100, The Natural Philosopher wrote:

> Rsync is an excellent backup tool. Not the least because it contains an
> exact copy of the source.

And you can rerun the rsync operation to the same destination, and confirm 
that it does nothing (i.e. nothing got left out). And for extra paranoia, 
you can specify the --checksum option, which forces it to reread 
everything, just to confirm that the copy was bit-for-bit exact.