Hadoop is an open source framework that stores and processes large data sets across clusters of computers using simple programming models. It is written in Java and allows for the distributed processing of large data sets across clusters of computers using simple programming models. This document provides information on learning Hadoop and big data technologies from Eduonix, including an overview of Hadoop, popular job roles, salaries, course topics covered, requirements, and how to access the self-paced online video tutorials and materials. The course aims to help professionals master MapReduce and Hadoop fundamentals to address the growing need for big data skills.