The first this to do is to check to see if your version fo DB2 and your version of SuSE Linux are supported. You did not specify the version of DP, so, I can't be really specific, but the support amtrices are at this URL
http://support.openview.hp.com/sc/support_matrices.jsp#DP
If you have a supported configuration, open your GUI< click on Help -> Guides, and find "Integration Guide for IBM Applications", and review Chapter 2
You are going to require an additional OnLIne extension license if you want to use the Integration to backup DB2