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  Commands hadoop dfsadmin -report #this command shows information about the Datanodes           connected to Masternode. hadoop fs  -put filename / #this command uploads file hadoop fs -cat /filename   #this command reads the file. hadoop fs -ls / #this command shows the uploaded file. hadoop fs -rm /filename #this command remove the file hadoop namenode -format #this command formats the directory created in Namenode hadoop-daemon.sh start namenode #this command starts the namenode hadoop-daemon.sh start datanode #this command starts the datanode hadoop-daemon.sh stop namenode #this command stops the namenode hadoop-daemon.sh stop datanode #this command stops datanode hadoop dfsadmin  -safemode leave#this command turns off the save mode.

  Before getting started with the case study of "Hanson Robotics" or before knowing about Sophia the Robot, we need to clear some topics first. What is Artificial Intelligence? Artificial intelligence (AI) is wide-ranging branch of computer science concerned with building smart machines capable of performing tasks that typically require human intelligence. AI is an interdisciplinary science with multiple approaches, but advancements in machine learning and deep learning are creating a paradigm shift in virtually every sector of the tech industry. What is  Machine Learning? Machine learning is a branch of Artificial intelligence that covers the statistical part of Artificial Intelligence. It teaches the computer or machine to solve the problem by looking at hundreds or thousands of examples, learning from them and then using that experience to solve the same problem in new situation. What is Deep learning? Deep learning is a very special field of machine learning where compute...

  Point to be discussed in this blog:- What is AWS? What is AWS CLI? How to Create Key pair in AWS using CLI? How to Delete Key pair in AWS using CLI? How to create and delete Security group? How to Start, Stop, and Terminate instance? How to Launch a new instance? How to create  EBS Volume of 1 GB? How to attach EBS Volume to an instance? So let's get started:- What is AWS? Amazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform, offering over 175 fully-featured services from data centers globally. Millions of customers including the fastest-growing startups, largest enterprises, and leading government agencies are using AWS to lower costs, become more agile, and innovate faster.  What is AWS CLI? The AWS Command Line Interface (CLI) is a unified tool to manage your AWS services. With just one tool to download and configure, you can control multiple AWS services from the command line and automate them through scripts. The AWS Comman...

  Before getting started with the case study of Indian Startups, let us first understand what is cloud computing and AWS?   What is Cloud Computing? Cloud computing is the on-demand delivery of IT resources over the Internet. Instead of buying, owning, and maintaining physical data centers and servers, you can access technology services, such as computing power, storage, and databases, on an as-needed basis from a cloud provider like Amazon Web Services (AWS). What is Datacenter? At its simplest, a data center is a physical facility that organizations use to house their critical applications and data. A data center's design is based on a network of computing and storage resources that enable the delivery of shared applications and data. The key components of a data center design include routers, switches, firewalls, storage systems, servers, and application-delivery controllers. What is the server? A server is a computer program or device that provides a service to anothe...