Git Full Documentation

# Ubuntu/Debian
sudo apt update
sudo apt install git -y

# Check version
git --version

# Set global username
git config --global user.name "Your Name"

# Set email
git config --global user.email "you@example.com"

# View configuration
git config --list

# Initialize repository
git init

# Check status
git status

# Add specific file
git add index.php

# Add all files
git add .

# Commit changes
git commit -m "Initial commit"

# Amend last commit
git commit --amend

# Show commit history
git log

# Compact log
git log --oneline

# Graph view
git log --graph --oneline --all

# List branches
git branch

# Create new branch
git branch feature-login

# Switch branch
git checkout feature-login

# Create and switch
git checkout -b feature-payment

# Merge feature into main
git checkout main
git merge feature-login

# Abort merge if conflict
git merge --abort

# Rebase feature onto main
git checkout feature-login
git rebase main

# Continue after conflict
git rebase --continue

# Add remote
git remote add origin https://github.com/user/repo.git

# View remotes
git remote -v

# Push to remote
git push origin main

# Pull updates
git pull origin main

# Clone repository
git clone https://github.com/user/repo.git

# Generate SSH key
ssh-keygen -t ed25519 -C "you@example.com"

# Add SSH remote
git remote set-url origin git@github.com:user/repo.git

# Test connection
ssh -T git@github.com

# Save changes temporarily
git stash

# List stashes
git stash list

# Apply stash
git stash apply

# Drop stash
git stash drop

# Soft reset (keep changes)
git reset --soft HEAD~1

# Hard reset (delete changes)
git reset --hard HEAD~1

# Revert commit safely
git revert HEAD

# Apply specific commit
git cherry-pick COMMIT_ID

# Create tag
git tag v1.0

# Push tag
git push origin v1.0

# Use credential manager (HTTPS)
git config --global credential.helper manager

# OR use SSH instead (recommended)
git remote set-url origin git@github.com:user/repo.git

# Ensure curl is installed
curl --version

# Install curl if missing (Ubuntu/Debian)
sudo apt update && sudo apt install curl -y

# Download and install Git Credential Manager
curl -L https://aka.ms/gcm/linux-install-source.sh | sh

# Configure Git to use it
git-credential-manager configure

# Verify installation
git config --global --list

# Store credentials in plain text
git config --global credential.helper store

Credential Cache Behavior

Note: When using :contentReference[oaicite:0]{index=0} with cache, credentials are stored temporarily in memory.

• ✔ No repeated login during active session
• ❌ Credentials are cleared after system restart
• ❌ Credentials are lost when session ends

Tip: Use cache for servers (e.g., EC2). For a permanent solution without repeated logins, consider using SSH authentication instead.

# Remove a configuration from the local repository
git config --unset user.name
git config --unset user.email

# Remove configuration from global Git settings
git config --global --unset user.name
git config --global --unset user.email

# Remove configuration from system-wide settings
sudo git config --system --unset user.name
sudo git config --system --unset user.email

# Verify current configuration
git config --list

# Remove an entire section (example)
git config --remove-section user

# View reference log
git reflog

# Recover commit
git checkout COMMIT_ID