DEV Community: Ragul

Bootstrap

Ragul — Thu, 30 Jul 2026 17:12:42 +0000

Bootstrap is a CSS framework. Think of a framework like a giant box of pre-built Lego pieces.

Instead of writing dozens of lines of CSS to make a nice-looking, blue, rounded button, the developers at Bootstrap have already written that code for you. All you have to do is attach a specific "label" (an HTML class) to your element, and Bootstrap does the heavy lifting.

With Bootstrap, you style your website by adding classes directly to your HTML.
Want a blue button? Just type <button class="btn btn-primary">Click Me</button>.
Want your text centered? Add class="text-center". It is almost like speaking plain English to your HTML!

LocalSend

Ragul — Sun, 26 Jul 2026 17:46:39 +0000

Fast, Private, Offline File Sharing Software

LocalSend is a free, open-source application that lets you securely share files, folders, and text directly between devices on your local network.

100% Free & Open Source: No hidden costs, subscriptions, or ads.
Offline Functionality: Works entirely on your local Wi-Fi
Privacy & Encryption: Features end-to-end encryption; your files never leave your network.
Cross-Platform Compatibility: Works on Linux, Windows, macOS, Android, iOS, and iPadOS.

Installation

LocalSend is widely available across major platforms: download it from the Google Play Store, Apple App Store, F-Droid, or via Linux package managers (Flatpak, Snap, AppImage).

LocalSend Web is the no-install web companion to the LocalSend ecosystem. It enables quick, peer-to-peer file transfers directly through a modern web browser without needing to download or install any native software.

website link - https://localsend.org

QR Code

Ragul — Thu, 23 Jul 2026 16:35:39 +0000

The QR (Quick Response) Code acts as the invisible glue holding the physical and digital worlds together. While the pandemic transformed the QR code into a survival tool for accessing restaurant menus, by 2026 it has officially evolved into a high-tech powerhouse. Today, QR codes are utilized to launch augmented reality experiences, facilitate instant tokenized payments, and allow users to automatically skip physical waiting lines.

The technology has grown from a basic shortcut.71% of consumers report that QR codes are genuinely helpful in their daily lives.Generation Z and Millennials represent the primary power users, with about half of them scanning a code at least once a week. The contemporary QR code operates within highly customized, secure, and dynamic ecosystems, replacing standard website shortcuts.

Linux Distros

Ragul — Wed, 22 Jul 2026 05:28:00 +0000

Linux is one of the most powerful and flexible operating systems in the world. Unlike Windows or macOS, Linux is open source, meaning anyone can view, modify, and distribute its source code. This freedom has led to the creation of hundreds of Linux distributions, commonly called distros. Each distro is designed with different goals, making Linux suitable for beginners, developers, gamers, businesses, and even cybersecurity professionals.

What is a Linux Distribution?

A Linux distribution is a complete operating system built around the Linux kernel. It includes essential software such as a package manager, desktop environment, system utilities, and applications. Different distributions customize these components to provide unique experiences while sharing the same Linux foundation.

Why Are There So Many Linux Distros?

Linux is open source, allowing communities and companies to create operating systems tailored to specific needs. Some distros prioritize ease of use, while others focus on stability, security, performance, or customization. This diversity ensures there is a Linux distribution for almost every type of user.

Popular Linux Distributions

Ubuntu

Ubuntu is one of the most beginner-friendly Linux distributions. Developed by Canonical, it offers a polished desktop experience, excellent hardware support, and a massive software repository. It is widely used for desktops, servers, and cloud computing.

Best for: Beginners, students, professionals, and developers.

Fedora

Fedora delivers the latest open-source technologies while maintaining stability. Sponsored by Red Hat, it often introduces new features before they appear in Red Hat Enterprise Linux. Fedora is popular among developers who want modern software and frequent updates.

Best for: Developers, programmers, and technology enthusiasts.

Debian

Debian is known for its exceptional stability and reliability. It serves as the foundation for many other distributions, including Ubuntu. Debian prioritizes free software and long-term stability over the newest features.

Best for: Servers, experienced users, and production environments.

Linux Mint

Linux Mint is designed to provide a familiar experience for users switching from Windows. It includes multimedia support, an elegant desktop environment, and user-friendly tools right after installation.

Best for: Windows users and beginners.

Arch Linux

Arch Linux follows a simple philosophy that gives users complete control over their operating system. It uses a rolling-release model, ensuring software is always up to date. Installing Arch requires more technical knowledge but offers unmatched customization.

Best for: Advanced users and Linux enthusiasts.

Manjaro

Manjaro is based on Arch Linux but simplifies installation and maintenance. It provides access to the Arch ecosystem while making it easier for everyday users.

Best for: Users who want Arch Linux without the complexity.

openSUSE

openSUSE offers two editions: Leap for stability and Tumbleweed for rolling updates. It includes powerful administration tools such as YaST, making system management straightforward.

Best for: Developers, administrators, and enterprise users.

Kali Linux

Kali Linux is built specifically for penetration testing and digital forensics. It includes hundreds of security tools used by cybersecurity professionals.

Best for: Ethical hackers, penetration testers, and cybersecurity students.

Pop!_OS

Developed by System76, Pop!_OS focuses on productivity, programming, and gaming. It features automatic window tiling, excellent hardware support, and optimized NVIDIA drivers.

Best for: Developers, content creators, and gamers.

Zorin OS

Zorin OS is designed for users transitioning from Windows. Its clean interface, familiar layout, and ease of use make migration simple while offering the benefits of Linux.

Best for: Windows users and beginners.

Types of Linux Release Models

Stable Release

Stable distributions release updates less frequently but focus on reliability. These are ideal for production systems and business environments.

Examples:

Debian Stable
Ubuntu LTS
Linux Mint

Rolling Release

Rolling-release distributions continuously receive updates, allowing users to access the latest software without reinstalling the operating system.

Examples:

Arch Linux
Manjaro
openSUSE Tumbleweed

Choosing the Right Linux Distro

The best Linux distribution depends on your needs:

New to Linux: Ubuntu, Linux Mint, Zorin OS
Software Development: Fedora, Ubuntu, Pop!_OS
Gaming: Pop!_OS, Fedora, Nobara
Servers: Debian, Ubuntu Server, Red Hat Enterprise Linux
Cybersecurity: Kali Linux, Parrot OS
Advanced Customization: Arch Linux, Gentoo

Advantages of Linux Distributions

Free and open source
Highly secure with fewer malware threats
Excellent performance on both modern and older hardware
Thousands of free applications
Powerful command-line tools
Strong community support
Highly customizable desktop environments
Ideal for programming, servers, and cloud computing

HTML Form

Ragul — Fri, 17 Jul 2026 05:22:44 +0000

An HTML form is essentially a delivery box for user data. You pack it with information using different input fields, seal it by clicking a submit button, and send it off to a server to be processed (like logging in, saving a setting, or sending a message).

Every form must be wrapped in a <form> tag. This shell tells the browser where to send the data and how to package it.

1.action
The URL or server endpoint where the data gets sent (e.g., /api/login).

2.method
The HTTP method used to send the data.

GET: Appends the form data directly to the URL. Use this for simple things like search bars, where security isn't a concern.

POST: Sends the data securely in the background. Use this for passwords, personal info, or large amounts of data.

<form action="/login" method="POST">
  <!-- The input fields go in here -->
</form>

The most common tool inside a form is the element. Changing its type attribute completely transforms how it looks and behaves in the browser.

eg:

1.<input type="text"> - names, cities

Standard single-line text box

2.<input type="password"> - passwords

Text box that masks characters

3.<input type="email"> - Email addresses

Text box that requires an @ symbol

4.<input type="radio"> - Selecting a payment method

Circular button (pick exactly one)

5.<input type="checkbox"> - I agree to the terms

Square box (pick multiple)

6.<textarea> - Comments, bios, messages

A large, multi-line text box

7.<select> - Selecting a Country or State

A dropdown menu

HTML Attributes

Ragul — Wed, 15 Jul 2026 17:27:20 +0000

HTML attributes are special features used to provide additional information about HTML elements. They modify the behavior of the element or define its characteristics.

Example
1.The src attribute specifies the source or location of the image. Similarly, the href attribute in the tag defines the destination of the link.

<img src="profile.jpg" alt="Profile">

<a href="https://www.dev.to">Click here to visit Dev Community</a>

2.The <input> tag, used for creating forms. Its type attribute defines what kind of input it is, like text, password, or checkbox. The placeholder attribute shows a hint inside the field before the user types anything.

<input type="text" placeholder="full name">

<input type="password" placeholder="password">

<input type="checkbox" id="terms">
<label for="terms">I agree to the terms and conditions</label>

4.The <form> tag itself, used to collect user data. It has an action attribute that points to where the data should be sent, and a method attribute to decide how the data is sent, usually GET or POST.

<form action="/submit-login" method="POST">
  <input type="text" placeholder="Username">
  <input type="password" placeholder="Password">
  <button type="submit">Login</button>
</form>

3.Global attributes like class and id can be added to almost any tag. class is used to style multiple elements with CSS, while id is used to uniquely identify a single element for scripting or linking.

<h1 id="main-title">Welcome to My Site</h1>

<p class="highlight-text">This is an important paragraph.</p>
<p class="highlight-text">This is another important paragraph.</p>

<div id="sidebar" class="layout-box highlight-text">
  Sidebar content goes here.
</div>

F-Droid

Ragul — Tue, 14 Jul 2026 18:15:39 +0000

F-Droid

F-Droid is a free and open-source app store for Android that provides a curated collection of open-source applications. Unlike traditional app stores, F-Droid focuses on transparency, user freedom, and privacy rather than profit.

F-Droid is an independent Android application repository that distributes only Free and Open Source Software (FOSS). Every app published on F-Droid has its source code publicly available, allowing anyone to inspect, modify, and verify it.

The project was created to give Android users complete control over the software they install.

F-Droid offers a wide range of features that make it an excellent alternative to traditional Android app stores. It provides a collection of 100% free and open-source applications, ensuring complete transparency and user freedom.

The official repository contains no advertisements or tracking libraries, helping users maintain their privacy. F-Droid is designed with a privacy-first approach, carefully selecting applications that respect user data. It also supports automatic app updates, making it easy to keep installed apps current.

The client is lightweight, fast, and simple to use, even on older Android devices. Unlike the Google Play Store, no Google account is required to browse or install applications. Additionally, F-Droid supports multiple repositories, allowing users to access apps from trusted third-party sources alongside the official repository.

Let's install F-Droid:

1.Go official F-Droid website https://f-droid.org.
2.Download the APK.
3.Install the application.

Obsidian

Ragul — Mon, 13 Jul 2026 18:19:11 +0000

Obsidian - Note Taking App

Think about the last time you read a great book, watched a fascinating video, or had a sudden thoughts. You probably grabbed your phone, typed it into an app, and... never looked at it again.

Most of us have a "digital graveyard." It’s a place where our notes, ideas, and bookmarks go to die. We put information into folders, and it just sits there, completely disconnected.

It’s Not Just a Notepad; It’s a Second Brain

Obsidian is a totally different way to think about writing things down. Instead of forcing you to organize your notes into rigid, boring folders (like Work > Projects > 2026), Obsidian lets you link your notes together like wikipedia

If you are writing a note about "Healthy Eating" and you mention "Sleep Habits," you can just put brackets around it like this: [[Sleep Habits]].

Instantly, Obsidian creates a bridge between those two ideas.

Graph View

Here is where Obsidian turns from a simple app into pure magic.

Because you are linking your notes together, Obsidian can draw a visual map of your thoughts. It’s called the Graph View.

Imagine a screen filled with glowing dots connected by thin lines. Every dot is a note you’ve written. Every line is a connection between them. As you write more, your graph grows. You stop seeing isolated notes and start seeing a glowing, interconnected web of your own mind.

It makes exploring your own ideas incredibly fun and addictive. You don't just search for a note anymore; you travel through your thoughts.

It’s Yours Forever

It saves your notes directly on your own computer.

They aren't locked away in a secret cloud server owned by a massive corporation. Your notes are saved as simple, everyday text files on your hard drive.

You don't need the internet to read them.

No one can suddenly delete them.

You will still be able to open and read them 50 years from now.

You have total privacy and complete ownership.

CSS

Ragul — Sun, 12 Jul 2026 03:28:58 +0000

HTML is building's framework, but CSS (Cascading Style Sheets) is the interior design.

It’s turns a plain, text-heavy page into a visually stunning experience.

we have three primary methods to use CSS. Each has its own ideal use cases.

CSS (Cascading Style Sheets) is the style language of the web. While HTML acts as the structural framework or "skeleton" of a website, CSS functions as the interior design. It turns plain, text-heavy code into a visually engaging experience by controlling layouts, colors, fonts, and responsiveness.

When designing a website, there are three primary methods to inject CSS into an HTML document, each serving a distinct purpose.

Types of CSS

1. Inline CSS

Inline CSS is used to apply a unique style directly to a single HTML element. The style rules are written directly inside the HTML tag using the style attribute.

Inside the HTML tag

<p style="color: blue; font-size: 18px;">Hello Friends</p>

2.Internal CSS

Internal CSS is defined within the <head> section of an HTML document, wrapped entirely inside a <style> tag. This method applies styles to the entirety of that single HTML page.

Inside the HTML file:

<head>
    <style>
        body {
            background-color: #f4f4f4;
        }
        h1 {
            color: darkgreen;
            text-align: center;
        }
    </style>
</head>

3.External CSS

External CSS is the best way to style websites. All CSS rules are written in a completely separate file with a .css extension and linked to your HTML files using the <link> tag inside the <head> section.

In `style.css`:

body {
    font-family: Arial, sans-serif;
    margin: 0;
}
.hello {
    background-color: blue;
    color: white;
}

In `index.html`:

<head>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <h1 class="hello">Hello Friends</h1>
</body>

Git: Essential Commands

Ragul — Fri, 10 Jul 2026 17:30:29 +0000

1.git init

Initializes a new, empty Git repository in your current directory. creates a hidden .git folder. This folder is the brain of your repository, storing all your tracking data, history, and branches.

git init

2.git clone

Creates a local copy of an existing remote repository.Instead of starting from scratch, git clone downloads all the files, branches, and commit history from a remote server to your local machine.

git clone <repository_url>

3.git status

Displays the state of your working directory.It won't change any files; it just tells you what is going on

git status

4.git add

Adds modified or new files.You have to tell it exactly what you want to include in your next save. The staging area is like a loading dock. git add moves files.

add a specific file:

git add <file_name>

add all changed files in the current directory:

git add .

5.git commit

It acts as a permanent save point, capturing the state of files at a specific moment in time.

git commit -m "message here"

6.git switch

Switches your working directory to a different branch.Once you create a branch, you have to move into it to start working.

git switch <branch_name>

7.git merge

Combines the history of one branch into another.

git merge <branch_to_merge_in>

8.git push

Uploads your local commits to a remote repository.Your local commits only exist on your computer. git push sends your saved milestones to the remote server (like GitLab and GitHub) so others can see and download your work.

git push origin <branch_name>

9.git pull

Fetches and downloads content from a remote repository and immediately updates the local repository.

git pull origin <branch_name>

Testing dev.to API

Ragul — Fri, 10 Jul 2026 13:21:42 +0000

testing

Git

Ragul — Thu, 09 Jul 2026 16:20:32 +0000

Git is a version control system. Git was created in 2005 by Linus Torvalds, the famous software engineer who also created the Linux operating system.

Git is open-source and free. This means anyone can use it, download it, and contribute to making it better.

If we are working alone, Git is great for keeping our files organized.But,when we work in a team, Git becomes essential.

Essential Git Commands

1.git init

Initialize a new Git repository

git init

2.git clone

If a project already exists online,use this command to download a full copy of it to our local storage

git clone URL

3.git add

Before we save a change, you need to tell Git which files to include.it's called staging.stage all modified files at once, use a period "."

git add .

4.git commit -m "message"

The -m stands for message. Always write a short description of what we changed.

git commit -m "message"

5.git push

use this command to upload our changes to a remote server.so team can access it.

git push

DEV Community: Ragul

Bootstrap

LocalSend

Fast, Private, Offline File Sharing Software

Installation

QR Code

Linux Distros

What is a Linux Distribution?

Why Are There So Many Linux Distros?

Popular Linux Distributions

Ubuntu

Fedora

Debian

Linux Mint

Arch Linux

Manjaro

openSUSE

Kali Linux

Pop!_OS

Zorin OS

Types of Linux Release Models

Stable Release

Rolling Release

Choosing the Right Linux Distro

Advantages of Linux Distributions

HTML Form

eg:

HTML Attributes

F-Droid

F-Droid

Let's install F-Droid:

Obsidian

Obsidian - Note Taking App

It’s Not Just a Notepad; It’s a Second Brain

Graph View

It’s Yours Forever

CSS

Types of CSS

1. Inline CSS

Inside the HTML tag

2.Internal CSS

Inside the HTML file:

3.External CSS

In style.css:

In index.html:

Git: Essential Commands

1.git init

2.git clone

3.git status

4.git add

5.git commit

6.git switch

7.git merge

8.git push

9.git pull

Testing dev.to API

Git

Essential Git Commands

1.git init

2.git clone

3.git add

4.git commit -m "message"

5.git push

In `style.css`:

In `index.html`: