Something like this:
TarClientCmd = $sshPath -q -x -n -l backuppc $host env LC_ALL=C usr/bin/sudo
$tarPath -c -v -f - -C $shareName --totals

Visudo:
# Allow backuppc to run tar without a password
backuppc ALL=NOPASSWD: /bin/tar



-----Original Message-----
From: Les Mikesell [mailto:lesmikesell AT gmail DOT com] 
Sent: Thursday, December 03, 2009 5:05 PM
To: General list for user discussion, questions and support
Subject: Re: [BackupPC-users] Problems to backup linux network computer

Jose Torres wrote:
> I have ssh password access on, but removed the root password.  So I can
> login but root requires the key.

If you are internet-exposed and running on port 22 you'll be hit by a 
lot of brute-force password guessing - not too likely to succeed if you 
have good user passwords, but still a possibility.

> But anyway I would like to do the "...connect as a different user and add
a
> sudo layer to run the backup."
> (I could create a key for backuppc, remove the password and make it sudoer
> on the remote server)
> 
> How would I do the sudo layer?

I thought it was on the wiki but I can't find it now and don't have an 
example myself.  It's pretty straighforward, though.  Just configure 
sudo to permit the command you want to run as root by the user in 
question on the target machine without password entry, then configure 
backuppc to send the command including the sudo via ssh.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com


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------------------------------------------------------------------------------
Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing. 
Attend in-depth sessions from your desk. Your couch. Anywhere.
http://p.sf.net/sfu/redhat-sfdev2dev
_______________________________________________
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BackupPC-users AT lists.sourceforge DOT net
List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki:    http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/