Git is the most important tool for every developer. Here is everything you need to know.

Basics¶

git init
git clone URL
git add .
git commit -m “message”
git push origin main

Branches¶

git branch feature/login
git checkout feature/login

or: git checkout -b feature/login¶

git merge feature/login
git branch -d feature/login

Merge vs Rebase¶

Merge creates a merge commit and preserves history. Rebase rewrites history to be linear. Rule: rebase local branches, merge shared ones.

Remote¶

git remote add origin URL
git fetch origin
git pull origin main
git push origin feature/login

Stash¶

git stash push -m “WIP”
git stash list
git stash pop

Tags¶

git tag -a v1.0.0 -m “Release 1.0”
git push origin –tags

Git Flow vs Trunk-based¶

• Git Flow: main, develop, feature/, release/, hotfix/ — for release-based projects
• Trunk-based: main + short-lived feature branches — for CI/CD, recommended

.gitignore¶

node_modules/
.env
*.log
dist/
.DS_Store

Git Hooks¶

.husky/pre-commit¶

npm run lint
npm run test

Useful Aliases¶

[alias]
co = checkout
br = branch
st = status
lg = log –oneline –graph –all

Mastery¶

You learn Git by practice. Don’t be afraid to experiment — reflog will always save you.