Writers: Vaishnavi Disale and Amaan Shaikh

“Plan your next move because every step contributes towards your goal.”

- Sukant Ratnakar

What is Cryptocurrency:

A cryptocurrency is a form of payment that can be exchanged online for goods and services. Cryptocurrency is a kind of digital currency that is intended to act as a medium of exchange.

A cryptocurrency is not a type of currency that can be used in the real world. It can be used to perform transactions only in the digital world. Typically, cryptocurrency is electronic-only and does not have a physical form. So in order to buy/sell using a cryptocurrency…


Introduction to three layers of the web.

Writers: Harshal Kodgire and Prathamesh Patil

“When you jump into the dark web, one click can put your life at stake!”

- Anonymous

Nowadays every one of us uses the Internet. It is almost impossible to imagine our lives without the Internet. All the searching, browsing, chatting, and streaming which we do works on the Internet! Not only that, even for educational purposes we are dependent on the Internet. So, it is very crucial for us to have a deep understanding of the Internet and layers of the Internet. Of the whole internet…


Complete information about the OSI model in networking.

Writers: Kajol Khairnar, Akhilesh Patki.

“Networking means the act of exchanging information with people who can help you professionally.”

- Michele Jennae

Hey Learners, welcome to this series of blogs by Walchand Linux User’s Group. You have already been introduced to Open Source, Web Application Security and Vulnerabilities, Blockchain, and Android development. But have you ever wondered how this great network formed?

Isn’t it amazing that searching for certain information via the internet gets availed within a fraction of a second?

Let us answer all these queries.

What is Network?

In the world of computers…


Introduction to Google.

Writers: Aniket Vyawahare, Vaishnavi Pawar.

We look for ideas with the potential to change the world.

- Google

Can you imagine a world without search engines? Before the invention of Archie, a simple yet effective web-based search engine, by Alan Emtage in 1990, finding anything online was less than pleasant. This was a turning point for internet users as it was closely followed by the launch of many other huge and better search engines, including Excite, Yahoo, Infoseek, AltaVista, AskJeeves, and of course the now ever-popular Google!

Although search engines populate highly personalized, contextual search results in…


A top-down introduction to Android and App Development

Writers: Shripad Deshpande, Ramkrushna Madole

“An app is not all about technology.
It is a dream towards future.”

A very warm welcome to all the thriving Open Source learners in this series of blogs by Walchand Linux Users’ Group. Get ready to dive deep into the world of Open Source technology. In our first blog on introduction to open source, we introduced the Open Source Learners to different Open Source technologies like Git, Gitlab, Raspberry Pie, etc. Here is an opportunity for learners to get a good overview of one such open…


An introduction to Blockchain and its building blocks

Writers: Pavan Shinde, Pratik Raut

Everything will be tokenized and connected by a blockchain one day.

- Fred Ehrsam

Blockchain is a technology to create and maintain a cryptographically secure, shared, and distributed ledger (a database) for transactions. Blockchain brings trust, accountability, and transparency to digital transactions.

Problems of the Current World

Today, blockchain is “the blockchain” because of Bitcoin. And if you look at the reason why Bitcoin was created, there is one word that can describe it better than anything else, i.e., TRUST. Bitcoin was created to overcome the mistrust and non-transparency of financial institutions.


Let’s dive into web applications, their security and common vulnerabilities.

Writers: Palak Shravagi, Suyash Chavan

A good programmer is someone who always looks both ways before crossing a one-way street.

- Doug Linder

A web application is an application that runs on browsers. It consists of front-end components that are the website interface, or what the user sees that runs on the client-side browser, and other back-end components like web application source code that runs on the server-side (back end server/databases). …


Explore the way towards Open Source

Writers: Maithili Sakhawalkar, Bhargav Kulkarni

Open source is quite a famous term nowadays. It is highly used not only by programmers but also by common people. But what exactly is open source? Let’s have thorough knowledge about it.

What is Open Source? 🤔

An open-source is software whose source code is easily available and accessible to the public. Thus, open-source software can be modified and redistributed. This means that anyone who wishes to improve the software can contribute to it. And this is the exact reason why open source software is constantly under modification and improvement. …

Walchand Linux Users' Group

We are Open Source Club from Walchand College of Engineering, Sangli

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