Gedankenstütze 1:1 aus dem Wiki von backuppc:

BackupPC version 3.0.0 is available via backports.
Add this line to /etc/apt/sources.list :

deb http://www.backports.org/debian etch-backports main contrib non-free

Import the GPG key for this repository, and update your repositories :

wget -O – http://backports.org/debian/archive.key | apt-key add -
apt-get update

Now you can install BackupPC from the backports repository by :

apt-get -t etch-backports install backuppc

In both cases, you will probably need these packages:

apt-get install rsync bzip2 par2 libfile-rsync-perl libfile-rsyncp-perl/etch-backports ntpdate

After installing, you will have the configuration file at /etc/backuppc and your data directory will be /var/lib/backuppc.

mount -t iso9660 -o ro,loop=/dev/loop0 /tmp/image.iso /mnt/iso