An Ultimate Guide to Git and Github

As a developer, we all know a little about Git and GitHub but there are some developers who still have doubt and question about Git and GitHub. Therefore in this article, I am going to break everything down regarding Git and GitHub, so that you can understand it clearly.

Introduction

Git is a source code management technology used by DevOps. It is a free and open-source version control system that is used to efficiently manage small to extremely big projects.

Git is a version control system. Version control is a file manager that maintains track of changes to your projects over time and keeps a complete history of whatever you're working on. It allows many developers around the globe to work together on the same project at the same time

GitHub is a site that hosts Git repositories, but it also has a lot of its own features. It is a web-based graphical interface for Git, which is a command-line application. Each project has access control and numerous collaborative capabilities, such as wikis and rudimentary task management tools.

It is the home of 56 million ( September 2020 ) developers around the globe which is currently owned by Microsoft

Installation

Every operating system has its own steps to install Git, In this article, I will cover Linux, Windows, and Mac ( Which are the most popular ones )

Linux

If you are a Linux user ( like me ), you will probably know that the Linux family is very big and It has many distros such as Ubuntu, Fedora, Arch and etc. However, in this article, I will cover Debian ( Ubuntu ) and Fedora

Debian / Ubuntu (apt-get)

From your shell, install Git using apt-get:

sudo apt-get install git

Verify the installation was successful by typing git --version:

git --version

Configure your Git username and email using the following commands. These details will be associated with any commits that you create.

git config --global user.name "Suhail Kakar"

git config --global user.email "suhail.zahed@gmail.com

Fedora (dnf/yum)

From your shell, you can install Git using dnf or yum

sudo dnf install git

sudo yum install git

Verify the installation was successful by typing git --version:

git --version

Configure your Git username and email using the following commands. These details will be associated with any commits that you create.

git config --global user.name "Suhail Kakar"

git config --global user.email "suhail.zahed@gmail.com

Windows

Download the latest Git for Windows setup
You should see the Git Setup wizard screen after you've successfully run the installer. Complete the installation by following the Next and Finish prompts. For most people, the default parameters are adequate.
Open a Command Prompt or Git Bash and run the below command to configure your Git username and email. These details will be associated with any commits that you create.

git config --global user.name "Suhail Kakar"

git config --global user.email "suhail.zahed@gmail.com

Mac

Download the latest Git for mac installer
Follow the prompts to install Git.

Or, install Homebrew and run the following to install an up to date version of Git on your Mac:

brew install git

Open a terminal and verify the installation was successful by typing the below command.

git --version

Configure your Git username and email using the following commands. These details will be associated with any commits that you create.

git config --global user.name "Suhail Kakar"

git config --global user.email "suhail.zahed@gmail.com

Basic GitHub terms

Fork: Fork is a copy of another user's repository that lives on your personal Github account. The major reason for this is to adapt other people's repositories to meet your needs.
Main: When you create a new repository, it comes with a default development branch.
Readme: It is a text file that contains information about other files in a repository. It is usually a basic plain text file called Read Me that serves as documentation.
Repository: A Repository is a place where tour work will be stored in a directory or storage space. This is sometimes abbreviated as "repo" by GitHub users.
License: If you want your repository to be genuinely open source, you'll need to license it so that others can use, modify, and distribute it.
Pull request: It allows you to announce a change made by you in the branch. It is a way for a developer to let the rest of the team know when they've finished a feature.

Basic Git Command

git init: The git init command creates a new Git repository. Executing this command creates a .git subdirectory in the current working directory, which contains all of the necessary Git metadata for the new repository.
git clone: The git clone command is used to create a copy of a specific repository or branch within a repository.
git branch <branch-name>: This git command is used to create a new branch for a specific repository.
git checkout <branch-name>: The git checkout command lets you navigate between the branches created by the git branch.
git add: It is the first command in a chain of operations that directs Git to "save" a snapshot of the current project state, into the commit history. It is used to tracks your file and changes in Git
git commit: The git commit command takes a snapshot of the current state of the project's changes.
git push : This command is used to upload git commits to a remote repository like Github

The power of Open Source is the power of the people. The people rule. ~ Philippe Kahn

Demonstration

To create a new folder, you need to use the below command.
```
mkdir demo-folder
```
To navigate to your newly created folder, use the below command.
```
cd demo-folder
```
To create a new file, you need to the below command.
```
touch index.js
```
Use the below command to see untracked changes in the index.js file.
```
git status
```
To add index.js, use the command below.
```
git add index.js
```
To commit your changes use the below command
```
git commit -m "added index.js file"
```

To add your remote origin link, use the command below

git remote add origin main https://github.com/suhailkakar/demo

To push your code to GitHub, you can use the below command
```
git push -u origin
```

GitHub special repository

GitHub offers a special repository by your username, which should contain a readme.md and it will show in your GitHub profile, just like mine

If you want a similar look, you can fork my repository here

Conclusion ⌛

I hope you found this article helpful. If you need any help please let me know in the comment section.

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👋 Thanks for reading, See you next time