Git

What is Git?

Git is a distributed version control system (DVCS) used to:

• track changes to files over time
• collaborate with multiple people on the same project
• manage branches independently
• sync code with GitHub or other remotes

Core features

• Version tracking: every change is recorded and can be reviewed later.
• Team collaboration: people can work in parallel on the same project.
• Branch management: separate work streams are created and merged later.
• Remote synchronization: the project can be pushed to GitHub for sharing.

Install Git

1. Download Git from git-scm.com

   • macOS: brew install git
   • Linux: sudo apt update && sudo apt install git

2. Check installation

git --version

3. Configure your identity

git config --global user.name "your name"
git config --global user.email "your email"
git config --list

GitHub integration

1. Register on GitHub
2. Create a repository
3. Generate an SSH key and add it to GitHub

ssh-keygen -t ed25519 -C "your-email"
cat ~/.ssh/id_ed25519.pub
ssh -T git@github.com

To link a local project to a remote repository:

git remote add origin "your-remote-url"

Basic workflow

clone → branch → edit → add → commit → push → PR

Clone a repository

git clone <ssh-or-https-url>

Check status

git status
git branch

Create a branch

git switch -c feature/update-thing

Stage changes

git add .
git add -p

Commit changes

git commit -m "update message"

Push to remote

git push -u origin <branch-name>

Branch strategy

A branch is an independent line of work. It allows multiple developers to work without interfering with one another.

Task	Command
List branches	git branch
Create branch	git switch -c feature/login
Switch branch	git switch main
Merge branch	git merge feature/login
Rebase branch	git rebase main
Delete branch	git branch -d feature/login

Summary

Git is the standard tool for version control in software development. It makes collaboration safer, improves traceability, and gives teams a clear way to manage change.