Needing to install NBU 7.5 client on RedHat 2.6.09

Hello,

We are trying again to get our Linux server NBU Client installed. We have not had any luck installing NBU since 6.5.4

I am running 7.5.0.3 and downloaded the 7.5 Client installs. The Unix Admin has tried loading them and he reports it is syaing - incompatable. We are using RedHat 2.6.09

We are going to be doing an upgrade on the software on the Linux box and would like to have a backup before this happens...

Thanks.