rsync using sudo via remote shell

Julian Cowley julian at
Tue Aug 31 21:33:05 GMT 2004

On Mon, 30 Aug 2004, Wayne Davison wrote:
> On Mon, Aug 30, 2004 at 08:08:09PM +0200, Achim St?bler wrote:
> > rsync -avz -e "ssh -i /home/backup/.ssh/id_dsa" backup at server:/
> > /backup/server/
> >
> > Unfortunately I can't figure out how to tell rsync to execute its remote
> > instance via sudo.
> You can do this via the --rsync-path option:
> rsync -avz -e "ssh -i /home/backup/.ssh/id_dsa" --rsync-path='sudo rsync' backup at server:/ /backup/server/
> You'll also want to make sure that sudo doesn't prompt for a password,
> so you could start with a simpler command right before the rsync:
> ssh -i /home/backup/.ssh/id_dsa -l backup server sudo date

If you are doing this interactively (not part of a batch
cronjob), an alternative to setting up sudo to not prompt for a
password is to validate remotely.  I usually do this:

stty -echo; ssh remote sudo -v; stty echo

I think sudo doesn't work this way if your sudo tickets are
per-tty, so make sure you have !tty_tickets in your sudoers file.
Then you can give the rsync command as above:

rsync -av --rsync-path='sudo rsync' remote:dir .

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