Hadoop daemons not running. (Ambari installation)

[#1]

I have successfully installed Ambari Service manually. I have installed most of the services which were listed in Ambari. However I do not see the hadoop deamons running. I don't even find the hadoop directory under /bin directory. I have the following questions:

1) When Ambari server is setup on a Centos machine, where does Ambari install Hadoop?

2) Under which folder Hadoop is installed?

3) Why is hadoop deamons not started automatically?

4) If hadoop is not installed, what are the next steps?

Please can someone help me, because I do not find anything documentation that helps me understand this?

[#2]

@Pradeep kumar jps ...

find / -name jps

[root@phdns01 ~]# find / -name jps

/usr/jdk64/jdk1.7.0_67/bin/jps

/usr/jdk64/jdk1.8.0_60/bin/jps

Please dont confuse start-dfs.sh "old school"

Smoke Test HDFS

1. Determine if you can reach the NameNode server with your browser:

   http://$namenode.full.hostname:50070

2. Create the hdfs user directory in HDFS:

   su - $HDFS_USER
   hdfs dfs -mkdir -p /user/hdfs

3. Try copying a file into HDFS and listing that file:

   su - $HDFS_USER
   hdfs dfs -copyFromLocal /etc/passwd passwd 
   hdfs dfs -ls

4. Use the Namenode web UI and the Utilities menu to browse the file system.

[#3]

Thanks everyone. I think I understand it better now :).

[#4]

@Pradeep kumar please accept best answer to close the thread.

[#5]

You can install jps manualky. You can run 'ps aux' and see processes you can run netstat and see ports running and yiu can run fsck to make sure hdfs is fine @Pradeep kumar