Axel Beckert wrote:

> 
> The more paranoid users who just want their data backed up, not the
> whole machine, won't give root permission to the backup server's ssh
> key. So we ssh into the user whose home directory we want to back. No
> problem so far.
> 
> But now I've got a few such boxes used by two or more persons (a
> professor and his phd students) and all want their home directory
> backed up, but they don't want to give out root login rights.
> 
[...]
> 
> + Giving multiple DNS aliases to the computers in question and then
>   seeing them als multiple hosts. (Hope, BackupPC doesn't several
>   hosts having the same IP address.)

Backuppc has it's own alias concept if you don't mind making each user 
look like a separate machine.  Make a fake host name in the backuppc 
host file with the user as the owner, give them a copy of the public ssh 
key and tell them to set $Conf{ClientNameAlias} to the real machine name 
while they are setting up a backup method and target that makes them happy.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com

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