Backing up multiple user data

Jack Mendez wiler1 at earthlink.net
Tue Sep 28 13:14:48 EDT 2004


okay

At 11:38 AM 9/28/2004, you wrote:
>Jack Mendez writes:
> > never said it could
> > only spoke about the fact that it does keep the permissions of the files
> > that it transfers.
>
>But he also wants to keep the ownership. That requires what he calls the
>"meta" container, of which tar is a perfect choice. There are others.
>
>If there was any criticism in my post, it was only about whether it
>answered the question. What you said is correct as far as you took
>things, but you can't go the rest of the way because rsync is the wrong
>tool for that job. It's the right tool for incrementally copying the tar
>archive, though once it is created with owners and permissions data
>intact, just as we've been saying.
> > At 07:54 AM 9/28/2004, you wrote:
> > >Not exactly. rsync will do as you say, but only if those users also
> > >exist on the target system. It cannot create new user accounts, and
> > >shouldn't be able to, either.
> > >
> > >Now that I've strayed into 'shoulds,'  I suppose we could posit the
> > >notion of rsync for passwd and shadow, but this just too wacky because
> > >it's dangerous.
> > >Jack Mendez writes:
> > >> there are several ways to accomplish what you want to do, rsync has very
> > >> helpful documentation, I'd suggest reading the manpages for it however,
> > >> here are a few quick solutions
> > >> rsync -av will preserve all permissions on the destination  machine, and
> > >> you will need to make sure when transferring this back to use the same
> > >> switch
> > >> if you are backing up entire file systems and are special files you
> > >need to
> > >> use the linkdest option so the files get transferred properly
> > >> additionally you can also backup remote file systems nfs smb etc, using
> > >> rsync but be careful about using permissions based transfers with this
> > >data
> > >> because sometimes particularly with windows based smb mounts, the rsync
> > >is
> > >> unable to preserve owner.
> > >>
> > >> Jack
> > >> At 01:34 AM 9/28/2004, you wrote:
> > >> >If rsync is used to backup data for multiple users, on to a system
> > >whereon
> > >> >the recipient for the files, is a single user, rsync will, of course,
> > >set
> > >> >the user and group of all files, to the recipient user.
> > >> >
> > >> >If dealing with a large number of users, it is less than ideal, to
> > >create
> > >> >all of the users on the target backup server.
> > >> >
> > >> >Is there any way to do such backups, in the rsync method, while still
> > >> >preserving ownership data, but without creating all of the users
> > >involved?
> > >> >Some sort of meta ownership data.
> > >> >
> > >> >If not, what might be another method of doing this?
> > >> >
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> > >                                Accessibility Workgroup
> > >                                Free Standards Group (FSG)
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>                                 Janina Sajka, Chair
>                                 Accessibility Workgroup
>                                 Free Standards Group (FSG)
>
>janina at freestandards.org        Phone: +1 202.494.7040
>
>
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