Ensure that the new slave nodes meet the following prerequisites:
- The following operating systems are supported: - 64-bit Red Hat Enterprise Linux (RHEL) 5 or 6 
- 64-bit CentOS 5 or 6 
- 64-bit SUSE Linux Enterprise Server (SLES) 11, SP1 
 
- At each of your hosts: - yum (RHEL) 
- zypper (SLES) 
- rpm 
- scp 
- curl 
- wget 
- unzip 
- tar 
- pdsh 
 
- Ensure that all of the ports listed in Configuring Ports are available. 
- To install Hive metastore or to use an external database for Oozie metastore, ensure that you deploy either a MySQL or an Oracle database in your cluster. For instructions, see see Meet Minimum System Requirements in Installing HDP Manually. 
- Your system must have the correct JDK installed on all of the nodes in the cluster. For further information, see Meet Minimum System Requirements in Installing HDP Manually. 


