"cluster status" and "cluster resources" commands do not return anything.

When customer adds a linux node to a mixed cluster they are not getting any results from "cluster status" or "cluster resources", no output at all and the cursor does come back so it is not a hung command.

Additional Symptom
  "cluster leave" and then "rcnovell-ncs restart" does not fix it when done on the problem linux node.

Make the Linux server the master node.  To do this the Master_IP_Address_Resource needs to be loaded on the problem node.
After doing this one time you will no longer have the problem any longer, even if a NetWare node becomes the master node.