Renumber users and groups

Mark Felder feld at
Wed Aug 21 15:19:36 UTC 2013

On Wed, Aug 21, 2013, at 7:36, Olivier Nicole wrote:
> Is there a clever/fast way to do that (other than find -exec chown)?

Maybe! I haven't tried this myself yet, but next time I need to do this
I think I'm going to take an mtree backup of the entire filesystem,
change the UIDs and GIDs (vipw, then vi /etc/groups), and then re-apply
the mtree to the entire filesystem. It should find all the files that
are now orphaned and fix them to use the new UID/GID that you specified.

> What pitfall should I avoid?

Not having a backup :)

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