Introduction The command line is a powerful tool for interacting with your computer, and for many Linux and Unix users, vi is a text editor of choice. vi is a modal text editor with a steep learning curve, but once you get the hang of it, you’ll find it’s an indispensable tool. In this blog post, we will explore 10 essential vi commands to help you navigate and edit text files efficiently. 1. Opening a File To open a file using vi, open your terminal and type: vi filename Replace “filename” with the name of the file you want to open. 2. Switching Modes vi operates in two modes: Normal and In ..read more

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Epic of Gilgamesh Introduction Homo Sapiens have come a long way from inventing the picture symbols known as hieroglyphics, and we have done a tremendous job in continuously refining them into modern-day smileys. The first true alphabet, as we know it today, was developed by the ancient Phoenicians around 1000 BC. The oldest surviving literature is the Epic of Gilgamesh, a Mesopotamian poem written on clay tablets that date back to around 2000 BC, which tells the story of the Sumerian hero Gilgamesh and his journey to find the secret of immortality. Written communication helps us pass informat ..read more

1. Introduction Markdown is one of the most popular markup languages. It is used to add style to plain text. You might have already used it when writing on StackOverflow or Github. It is also used for writing documentation and creating static websites. This blog is a quick tutorial for Markdown. Some of the famoMarkdownscumentation system swagger supports Markdown. Jekyll tool Markdownsed to create static websites using Markdown. 2. Simple Example of Markdown Below is a simple example generated on an online Markdown editing tool https://dillinder.io/ 3. How Markdown works In the above example ..read more

1. Introduction Whether we are launching a tech product or blog, an online shop, or an online portfolio of our creative work, having a web presence is essential in this internet driven world. This article will introduce different key-terms involved in launching a website. We will de-mystify different terms that we come across when it comes to creating our website. We will go through all the steps involved in the process of launching a website. In this article, we will be taking different services from Bigrock hosting provider for illustration purposes. These concepts can be applied to other ho ..read more

1. Introduction In this article, we learn about SQL injection security vulnerability in web application. We see an example of SQL Injection, learn in in-depth how it works, and see how we can fix this vulnerability. We use PHP and MySQL for the examples. The SQL injection is the top exploit used by hackers and is one of the top attacks enlisted by the OWASP community. 2. What is SQL Injection SQL Injection is a attack mostly performed on web applications. In SQL Injection, attacker injects portion of malicious SQL through some input interfaces like web forms. These injected statements goes to ..read more

1. Introduction Setting up and managing our own servers can take a considerable amount of time especially if we are not a day to day linux user. That is why we see things like serverless and containers catching on. There’s another option out there though too and it’s called unikernels. What are unikernels though? Unikernels are simple single application operating systems. Instead of deploying our software on top of linux unikernels create an operating system out of our application and run only that app – nothing else. There’s no concept of usernames/passwords or sshin’g into the application as ..read more

1. Introduction Two-factor Authentication, also known as 2FA is a type, or subset, of Multi-factor Authentication. Multi-factor authentication is a method of confirming identity using by combination of two or more claimed identities. 2FA is a method of confirming users’ claimed identities by using a combination any two different factors from below: something they know something they have something they are Essentially, this approach allows us to create a restriction for certain areas in our application. It ensures that only the right people have access to the resources in those areas. In thi ..read more

1. Introduction Software engineering is a combination of art and science. In this article, we will understand the most basic and essential software design principle: SOLID, which is an acronym for five different principles given by Robert C. Martin. He is famously known as Uncle Bob. Software designed using these principles is easily extensible, maintainable, reusable and better suited to the adaptive or agile style of business needs. Following these principles also help to avoid code smells and leaves the code to be easily refactor-able. Followings are the five principles: S – Single-responsi ..read more

1. Introduction In software engineering and development, things change very quickly. We need to move forward and keep ourselves and our code up to date. Software development mostly revolves around code re-use because there is no point in writing login-signup again and again. There are ways to share our code with others and to use the code shared by others. In the PHP ecosystem, the composer is the most widely used dependency manager. Assuming that we know how the composer works, we want to explore how we can share our code or libraries that can be used by others in their projects. Let us get s ..read more