Hadoop system administrators Certification 1.  Cloudera http://www.cloudera.com/content/cloudera/en/training/certification/ccah/prep.html  

2. Hortonworks

** Installation

Configure a local HDP repository
Install ambari-server and ambari-agent
Install HDP using the Ambari install wizard
Add a new node to an existing cluster
Decommission a node
Add an HDP service to a cluster using Ambari

Configuration

Troubleshooting 

Restart an HDP service

View an application’s log file

Configure and manage alerts

Troubleshoot a failed job

High Availability

Configure NameNode HA

Configure ResourceManager HA

Copy data between two clusters using distcp

Create a snapshot of an HDFS directory

Recover a snapshot

Configure HiveServer2 HA

Security

Install and configure Knox

Install and configure Ranger

Configure HDFS ACLS

Configure Hadoop for Kerberos

 

 

Reference

 Hortonworks http://hortonworks.com/training/class/hdp-certified-administrator-hdpca-exam/