Need to backup Debian 6 physical server from DP 10.10 Cell

We need to establish backup of a Linux Debian 6 physical server. Cell is DP 10.10. How do we install the software on the Debian box?

The message from the Linux installation server is: "RPM Package Manager is not installed or configured properly", which probably is correct - as far as I have been able to tell RPM is not supported on Debian 6.

What can I do to work around this problem?

 

Thank you in advance,

Erik