Question/comment about -n (dry run) flag of rsync
Kevin Korb
kmk at sanitarium.net
Tue Mar 10 22:32:31 UTC 2020
If you used -v then the very last line rsync outputs is:
> total size is ### speedup is ### (DRY RUN)
--
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Kevin Korb Phone: (407) 252-6853
Systems Administrator Internet:
FutureQuest, Inc. Kevin at FutureQuest.net (work)
Orlando, Florida kmk at sanitarium.net (personal)
Web page: https://sanitarium.net/
PGP public key available on web site.
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On Tue, 10 Mar 2020, T. Shandelman via rsync wrote:
> Date: Tue, 10 Mar 2020 17:26:41 -0500
> From: T. Shandelman via rsync <rsync at lists.samba.org>
> To: rsync at lists.samba.org
> Subject: Question/comment about -n (dry run) flag of rsync
>
> Rsync is a remarkably handy tool that I use virtually every day.
>
> But there is one thing about rsync that drives me totally crazy.
>
> Under the -n (dry run) flag, rsync seems to produce exactly the same output
> as without that flag.
>
> I cannot tell you how many times I sit and scratch my head long and
> hard,after I discover that my intended rsync operations did not actually
> happen. Until I finally remember that I ran rsync in dry-run mode. That's
> why! This is especially a problem for very long-running rsync jobs run in
> dry-run mode.
>
> It seems to me that when run in dry-run mode, rsync should display a
> warning at the very, very end, something like:
>
> *WARNING: None of the above operations have been actually performed, *
> *because you ran rsync in dry-run mode.*
>
>
> Or does rsync already have such a feature, and I am not aware of it?
>
> But if not, that is my vote for the next feature to be added. It should be
> a very, very easy fix.
>
> Todd S.
> Austin, Texas, USA
>
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