First of all, I want to tell you. here all content you will get practical only. for the theoretical part, you can follow edureka videos and Durgasoft videos. once you complete some videos related to map-reduce and Hadoop ecosystem..after that you can follow me... you need to go step by step:- 1. What is big data 2. What is the need of Hadoop 3. How Hadoop works. 4. Tools in Hadoop ecosystem. If you are a beginner then first you need some configuration in your system which is: 1: RAM:- Minimum RAM size should be 8gb otherwise you will get frustrated because of a slow system. if you go with 16gb RAM then it will be great. My opinion is to go with 16gb RAM. 2: Download VMWARE. https://my.vmware.com/en/web/vmware/info/slug/desktop_end_user_computing/vmware_workstation_pro/14_0 3. Download Cloudera -> https://www.cloudera.com/downloads/cdh/5-14-0.html . install it in VMWARE without installing os in WMWARE. 4. Download Eclipse for Map Reduce pro