I had a situation with the NBU *nix install scripts not recognizing the cluster, and it complicated the situation that they don´t show cluster information until very late in the install/upgrade process.
In the newer 7.6 scripts I see several new checks in the beginning of the scripts (like checking open file values etc.), could we perhaps have some kind of "Cluster identified" info line before accepting the scripts to continue with the upgrade, so we know everything is OK?