Git and GitHub Complete Beginner’s Guide: Installation, Commands and Branching Explained
Every developer, at some point in their early days, accidentally deletes code they spent hours writing and has no way to get it back. Or they make a change that breaks everything and cannot remember what the working version looked like. Or they try to work on the same project as a classmate and end up with two completely different versions of the same file with no idea how to combine them.
These are not rare, unusual problems. They are things that happen to almost every person learning to code before they discover Git.
Git does not just solve these problems. It removes them entirely.
What Is Git and Why Does It Exist
Git is a version control system. In simple terms, it tracks every change you make to your code over time, stores those changes in a structured way, and allows you to go back to any earlier version of your project whenever you need to.
Think of it like a detailed save history for your entire project, except much more powerful than anything you have encountered in a regular application. Every time you save a meaningful change using Git, it creates a snapshot of exactly how your project looked at that moment. You can have hundreds of these snapshots, move between them freely, and never worry about losing work again.
Git was created by Linus Torvalds in 2005, the same person who created the Linux operating system. He built it because the team working on Linux needed a way to manage contributions from thousands of developers working simultaneously on the same codebase. What he built to solve that problem became the most widely used version control system in the world.
What Is GitHub and How Is It Different From Git
This is the question almost every beginner has, and the confusion is understandable because the two names are so similar.
Git is the tool. It runs on your local machine and tracks changes to your code. It works entirely offline and does not require any internet connection to function.
GitHub is a website that hosts Git repositories online. It gives your code a home on the internet so that it can be accessed from anywhere, shared with others, and collaborated on by multiple people at the same time.
Git without GitHub is still useful. You can use it entirely on your own machine to manage personal projects. But combining Git with GitHub unlocks everything that makes modern software development possible, including collaboration, open source contribution, portfolio building, and professional project management.
Why Every IT Student Needs to Learn This Now
Git and GitHub are not optional tools that developers use occasionally. They are the standard. Almost every company that writes software uses Git for version control, and almost every developer team uses GitHub or a similar platform to host and manage their code.
When you apply for an IT job, one of the first things a recruiter or hiring manager will ask for is your GitHub profile. It is where they go to see what you have actually built, how you write code, how consistently you work, and whether your projects are organized and documented professionally.
A student with an active GitHub profile showing real projects, consistent commits, and clean documentation will always stand out over a student who only submits a resume with no supporting evidence of their work.
Beyond career benefits, Git simply makes you a better developer. It teaches you to think in organized, deliberate steps, commit changes intentionally, and maintain a clean project history that anyone can follow.
Installing Git on Your Machine
Before you can use Git, you need to install it on your computer. The process is simple and takes only a few minutes.
On Windows, you download Git from the official Git website and run the installer. The default settings during installation are fine for most beginners. The installer also includes Git Bash, a terminal application that lets you run Git commands on Windows exactly the same way you would on Linux or macOS.
On macOS, Git is often already installed. Opening the terminal and typing git –version will tell you immediately. If it is not installed, macOS will prompt you to install it automatically.
On Linux, Git can be installed through the package manager in a single command. On Ubuntu or Debian based systems, this takes only a few seconds.
Once installed, the first thing you need to do is tell Git who you are. This matters because every change you save will be stamped with your name and email, which is important when multiple people are working on the same project.
Open a terminal and run these two commands, replacing the name and email with your own:
git config –global user.name “Your Name”
git config –global user.email “youremail@example.com“
This configuration only needs to be done once and will apply to every project you work on going forward.
Understanding the Core Concepts Before You Touch Any Commands
A lot of Git tutorials dive straight into commands without explaining the concepts behind them, which leads to students memorizing steps they do not understand and getting confused the moment something unexpected happens.
Before running a single command, it helps to understand a few key ideas.
A repository, usually shortened to repo, is simply a folder that Git is tracking. When you turn a regular folder into a Git repository, Git begins monitoring every file inside it and recording changes over time.
A commit is a saved snapshot of your project at a specific moment. Think of it as pressing a deliberate save button that also writes a note explaining what you changed and why. Every commit has a unique identifier and a message attached to it that you write yourself.
A branch is a separate version of your project that exists alongside the main version. Branches let you experiment, add features, or fix problems without touching the working version of your code until you are ready. This is one of the most powerful features in Git and something professional developers use constantly.
Staging is the step between making a change and saving it as a commit. Git does not automatically include every changed file in a commit. You choose exactly which changes to include by adding them to a staging area first. This gives you complete control over what each commit contains.
Your First Git Repository: Step by Step
Start by creating a new folder on your computer for a practice project. Open a terminal and navigate into that folder.
To turn this folder into a Git repository, run:
git init
This single command creates a hidden folder inside your project called .git, which is where Git stores all its tracking information. You never need to touch this folder directly, but its presence means Git is now watching everything that happens inside your project.
Create a simple text file inside your project, add some content to it, and save it. Now run:
git status
This command shows you the current state of your repository, including which files have been changed and which are ready to be committed. Your new file will appear here as an untracked file, meaning Git sees it but has not been told to track it yet.
To add it to the staging area, run:
git add filename.txt
Or to add every changed file at once:
git add .
Now run git status again. You will see the file listed under changes to be committed, which means it is staged and ready to be saved.
To create your first commit, run:
git commit -m “Add my first file”
The text inside the quotation marks is your commit message. Write something meaningful that describes what you actually changed. Good commit messages matter more than most beginners realize, especially when you are working in a team or looking back at a project weeks later trying to understand what happened.
Creating a GitHub Account and Your First Repository
Go to github.com and create a free account if you do not already have one. Choose a username that looks professional since this will be visible to recruiters and employers who look at your profile.
Once logged in, click the button to create a new repository. Give it a name, add a short description, and choose whether you want it to be public or private. For portfolio projects, public is better since it allows anyone to see your work.
GitHub will show you a set of commands to connect your local Git repository to this new online one. Copy and run those commands in your terminal. Once done, your local project is now linked to GitHub.
To push your local commits to GitHub, run:
git push origin main
After this command completes, refresh your GitHub repository page in the browser. Your files will be there, visible online, accessible from anywhere.
The Commands You Will Use Every Single Day
Once you are past the initial setup, Git comes down to a small set of commands that you will use constantly. Understanding these well is more valuable than knowing dozens of obscure commands you will rarely need.
git status shows you the current state of your repository at any moment. Run this often. It keeps you informed about what has changed, what is staged, and what is ready to commit.
git add stages files for your next commit. Use git add . to stage everything at once, or specify individual files when you want more control over what goes into a particular commit.
git commit -m saves a snapshot of your staged changes with a message. The message should describe what changed and why. Keep it concise but informative.
git push sends your committed changes from your local machine to GitHub. Run this after committing when you want your changes to be reflected online.
git pull downloads changes from GitHub to your local machine. This is important when you are working with others, since pulling regularly keeps your local copy up to date with whatever your teammates have pushed.
git log shows you a history of all the commits made in a repository, including who made them, when, and what message was attached to each one. This is how you look back through a project’s history.
git diff shows you exactly what changed in a file before you commit it. Running this before committing is a good habit that helps you catch mistakes before they are permanently recorded.
Branching: The Feature That Changes Everything
Branching is where Git moves from being useful to being genuinely powerful.
When you create a branch, you are essentially creating a parallel version of your project where you can make changes freely without affecting the main version. Once your changes are ready and tested, you merge the branch back into the main version.
This workflow is how every professional development team operates. A developer never works directly on the main branch of a live project. They create a branch, build their feature, test it thoroughly, and then merge it in when it is ready.
To create a new branch, run:
git checkout -b feature-name
Replace feature-name with something descriptive of what you are working on. You are now working inside this new branch, and any commits you make will not touch your main branch at all.
When you are ready to bring your changes back into the main branch, switch back to main and merge:
git checkout main
git merge feature-name
This takes everything from your feature branch and combines it with the main branch.
What a Good GitHub Profile Looks Like
Your GitHub profile is one of the most important things a recruiter sees. It tells a story about how you work, what you build, and how consistently you show up.
A strong GitHub profile has repositories with clear names that tell you immediately what each project does. Every repository has a README file that explains the project, what problem it solves, what technologies it uses, and how to run it. The commit history shows regular activity, not one massive commit every few weeks. Projects look organized and complete, not abandoned halfway through.
Write README files for every project you put on GitHub. It takes twenty minutes and transforms a folder of code into something that looks professional and considered.
Commit regularly and with meaningful messages. A profile with consistent daily or weekly commits over several months demonstrates something that no resume bullet point can, that you actually practice.
Common Mistakes Beginners Make With Git
Writing vague commit messages is one of the most common habits beginners develop and one of the hardest to break later. Messages like “update” or “fix” or “changes” tell you nothing about what actually happened. Write messages that would make sense to you six months from now reading them cold.
Committing everything in one massive commit at the end is another common mistake. Commit small, logical changes frequently. Each commit should represent one meaningful unit of work, not an entire week of changes bundled together.
Working directly on the main branch for every change is a habit that causes problems the moment you start collaborating. Start practicing branching early, even on personal projects, so the workflow feels natural before you need it in a team environment.
Ignoring the .gitignore file is something many beginners overlook. A .gitignore file tells Git which files should never be committed, such as passwords, API keys, or system-generated files. Every project should have one from the start.
Final Thought
Git and GitHub are tools that will follow you through your entire IT career, regardless of which specific direction you take. Whether you become a full stack developer, a data scientist, a DevOps engineer, or a cybersecurity professional, version control will be part of your daily workflow from your first job onward.
Start using it now, before you feel ready, because the earlier you build these habits the more natural they become. Create a GitHub account today, push your first project this week, and commit to keeping it active.
The recruiter who eventually looks at your profile will see exactly how long you have been building things. Make sure that history starts as early as possible.
Role of TuxAcademy
TuxAcademy can help you learn programming effectively.
We provides:
Structured learning path
Hands-on projects
Mentorship from experts
Interview preparation
Placement support
TuxAcademy offers programming courses focused on practical learning and real-world applications.
Challenges in Learning Programming
Learning programming can be challenging.
Understanding logic and concepts
Debugging errors
Keeping up with new technologies
Continuous practice required
With proper guidance and consistent effort, these challenges can be overcome..
Call to Action
If you want to learn programming and build a strong career in IT, start with expert guidance and hands-on training.
TuxAcademy offers industry-focused programming courses with real-world projects, internships, and placement support.
Visit https://www.tuxacademy.org/ to explore courses and begin your journey in programming.