How to install ElasticSearch

What is Elasticsearch?

How to install Elasticsearch?


1. Download the latest version of ElasticSearch from their site

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  1. Unzip the to a suitable folder
  1. Goto / bin
  1. Run ./elasticsearch

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Verify the installation

By default ElasticSearch runs on port 9200. Use postman to verify that you can get response back

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The complete tutorial can be downloaded from How to install ElasticSearch

How to make a simple Solar Cooker from a shoe box

Today I attempted a long pending dream of making a solar cooker from household items.

Items needed are

  • a shoe box
  • black color paint
  • scissor
  • glue
  • cutter
  • aluminium foil (you can use the one from kitchen)
  • a transparent plastic
  • some cardboard pieces


1) Paint the bottom (inner side) of the shoe box with the black color. This will help in retaining the sun rays in the box

2) Cut 4 cardboard pieces such that they can fit inside the box and act as 4 walls. Now cover these with aluminium foil

3) Take a cardboard piece & draw out a rectangular window leaving approximately 2.5 cms width from all the edges of the cardboard. Now cut this rectangular piece & cover the remaining piece with the transparent plastic. This will act as a lid.

4) Cover the top (inner side) of the box with aluminium foil. This will help in directing the sun rays in the box.

Done. Your solar cooker is ready. This will take approximately 50 mins to make.

I tried out maggi & it turned our pretty well. Though it did not cook in 2 mins, I was happy to see it cook in about 15 mins

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Getting Started with Yeoman

What is Yeoman?

Yeoman is a scaffolding tool that helps you to kickstart new projects using best practices. It creates the project hierarchy & the basic files required for many projects using technology specific generators.

e.g. Yeoman provides a generator for angular project called as generator-angular


Node has to be installed to progress.

Steps to get started with Yeoman

1) Steps to setup dev env

Install yo & its dependencies using the below command

npm install –global yo bower grunt-cli

If you see issues related to permission please execute the command with sudo privileges.

2) Check if everything is installed properly. If everything is fine, the versions of yo, bower & grunt should be displayed

yo –-version && bower –-version && grunt –-version

3) Install a Yeoman Generator for Angular. Note that there are many generators which you can use yeoman for

sudo npm install -g generator-angular

4) Make a new directory (say demoYeoman)

5) Goto the newly created directory (demoYeoman in our case)

6) Hit the ‘yo’ command by selecting ‘Run the Angular Generator’. At this step yo will ask for configuring your project. Select the defaults.Yeoman will automatically scaffold your app along with the necessary dependencies

7) Check the project structure generated

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8) Start the server. In mac, python is installed by default which provides a simple http server. Start that server using the below command

python -m SimpleHTTPServer 9999

9) Check your application. Run the below command

grunt test

If any point you get errors related to karma, hit the following 2 commands-

sudo npm install grunt-karma –save-dev          

     npm install karma-phantomjs-launcher –save-dev 

Download the PDF version