Added Git Notes

Author: HarshKumarSaw

git_cheatsheet.md

@@ -0,0 +1,139 @@
+# Git & GitHub Cheat Sheet
+
+A concise, navigable reference for everyday Git tasks, formatted in Markdown.
+
+---
+
+## 1. Configuration  
+Set your identity once, then verify:
+
+```bash
+# Tell Git who you are
+git config --global user.name "Your Name"
+git config --global user.email "you@example.com"
+
+# List all config settings
+git config --list
+```
+
+---
+
+## 2. Starting a Repository  
+
+### A. Clone an existing repo  
+```bash
+git clone <SSH-or-HTTPS-URL>
+cd <repo-folder>
+```
+
+### B. Initialize a new repo locally  
+```bash
+git init
+```
+
+---
+
+## 3. Remotes  
+```bash
+# Add an “origin” remote for an existing local repo
+git remote add origin <SSH-or-HTTPS-URL>
+
+# List configured remotes
+git remote -v
+
+# Rename the remote (e.g. from “origin” to “upstream”)
+git remote rename origin upstream
+```
+
+---
+
+## 4. Checking Status & History  
+```bash
+git status       # What’s staged, unstaged, untracked?
+git log          # Full commit history
+git log --oneline --graph --decorate  # Compact, visual history
+```
+
+---
+
+## 5. Staging & Committing  
+```bash
+git add <file>       # Stage a specific file
+git add .            # Stage all changes in current directory
+git commit -m "Msg"  # Commit staged changes with message
+```
+
+---
+
+## 6. Pushing & Pulling  
+```bash
+# First push: set the upstream (remote + branch) at the same time
+git push -u origin main  
+
+# Subsequent pushes (working on the same branch):
+git push           # thanks to -u, you don’t need origin/branch
+
+# Fetch & merge changes from remote
+git pull origin main
+```
+
+---
+
+## 7. Branching & Checkout  
+```bash
+git branch               # List all local branches
+git branch -M newName    # Rename current branch to newName
+git checkout <branch>    # Switch to existing branch
+git checkout -b <branch> # Create + switch to new branch
+git branch -d <branch>   # Delete a local branch (if merged)
+```
+
+---
+
+## 8. Merging & Diff  
+```bash
+# View diff between your current HEAD and another branch
+git diff <branch>
+
+# Merge another branch into your current one
+git merge <branch>
+```
+
+---
+
+## 9. Undoing & Resetting  
+> **⚠️ Warning:** Some of these commands rewrite history — use with care!
+
+```bash
+# Unstage changes in a file (keeps edits in working directory)
+git reset <file>
+
+# Unstage everything
+git reset
+
+# Reset to one commit back (moves HEAD to parent)
+git reset --mixed HEAD~1     # default; doesn’t touch working files
+git reset --soft  HEAD~1     # keeps staged changes
+git reset --hard  HEAD~1     # discards changes in working directory
+
+# Reset to a specific commit (by its hash)
+git reset --hard <commit-hash>
+```
+
+---
+
+## 10. Quick Tips  
+
+- **Amend last commit** (to adjust message or include new staged changes):  
+  ```bash
+  git commit --amend
+  ```
+- **Stash unfinished work**:  
+  ```bash
+  git stash      # Save local changes
+  git stash pop  # Reapply stashed changes
+  ```
+- **Restore a file from the last commit**:  
+  ```bash
+  git restore <file>
+  ```

git_ssh_cheatsheet.md

@@ -0,0 +1,139 @@
+# Git & GitHub via SSH – Cheat Sheet
+
+A complete reference for using Git and GitHub **securely via SSH** from the terminal (e.g., Termux).
+
+---
+
+## 1. Initial Configuration
+
+```bash
+# Set your identity
+git config --global user.name "Your Name"
+git config --global user.email "you@example.com"
+
+# Check your configuration
+git config --list
+```
+
+---
+
+## 2. Generate & Add SSH Key to GitHub
+
+```bash
+# Generate a new SSH key
+ssh-keygen -t ed25519 -C "you@example.com"
+
+# Start the ssh-agent in the background
+eval "$(ssh-agent -s)"
+
+# Add your private key to the ssh-agent
+ssh-add ~/.ssh/id_ed25519
+
+# Show your public key
+cat ~/.ssh/id_ed25519.pub
+```
+
+🔗 Go to [https://github.com/settings/ssh/new](https://github.com/settings/ssh/new) and paste the public key.
+
+---
+
+## 3. Test SSH Connection
+
+```bash
+ssh -T git@github.com
+```
+
+✅ You should see:
+```
+Hi username! You've successfully authenticated...
+```
+
+---
+
+## 4. Clone Repository (SSH)
+
+```bash
+git clone git@github.com:username/repo-name.git
+cd repo-name
+```
+
+---
+
+## 5. Regular Git Commands (via SSH)
+
+### A. Staging & Committing
+```bash
+git status              # Check changes
+git add <file>          # Stage a file
+git add .               # Stage all files
+git commit -m "Message" # Commit staged changes
+```
+
+### B. Pushing & Pulling
+```bash
+git push -u origin main   # First push with upstream set
+git push                  # Subsequent pushes
+git pull origin main      # Pull latest changes from GitHub
+```
+
+---
+
+## 6. Branching
+
+```bash
+git branch                # List branches
+git checkout <branch>     # Switch branch
+git checkout -b <branch>  # Create + switch
+git branch -d <branch>    # Delete a local branch
+git branch -M new-name    # Rename current branch
+```
+
+---
+
+## 7. Remote Setup
+
+```bash
+# Set remote origin to use SSH
+git remote add origin git@github.com:username/repo-name.git
+
+# Verify the remote URL
+git remote -v
+```
+
+---
+
+## 8. Merging & Diff
+
+```bash
+git diff <branch>        # See difference from another branch
+git merge <branch>       # Merge into current branch
+```
+
+---
+
+## 9. Undoing & Resetting
+
+```bash
+git reset <file>              # Unstage a file
+git reset                     # Unstage all files
+git reset --mixed HEAD~1      # Reset last commit (keep changes)
+git reset --hard HEAD~1       # Reset last commit (discard changes)
+git reset --hard <commit-hash># Reset to specific commit
+```
+
+---
+
+## 10. Tips & Helpers
+
+```bash
+git log                           # Commit history
+git log --oneline --graph         # Compact visual history
+git restore <file>               # Restore file to last commit
+git stash                        # Save uncommitted changes
+git stash pop                    # Reapply saved changes
+git commit --amend               # Edit last commit
+```
+
+---
+
+✅ Now you're set up to use Git and GitHub entirely via SSH!