my-docs/Code-Management/Git/main.md

Git Commands Guide

1. Installation and Setup

Install Git

Download from git-scm.com.

Verify Installation

git --version

Configure User Info

Set your name and email for commits:

git config --global user.name "Your Name"
git config --global user.email "your.email@example.com"

2. SSH Key Configuration

Use a custom SSH key:

git config --add --local core.sshCommand 'ssh -i <PATH_TO_SSH_KEY>'

Clone with custom key:

git -c core.sshCommand="ssh -i <key-path>" clone host:repo

3. Initialize Repository

Create a new Git repo:

git init -b main

• -b main: Sets default branch name to main.

4. Basic Workflow

Stage and Commit

Stage all changes:

git add -A

Commit changes:

git commit -m "Initial Commit"

Connect to Remote

Link local repo to remote:

git remote add origin <Repo-Link>

Push to Remote

git push origin main

5. Repository Status and History

Check Status

git status

Shows staged, unstaged, and untracked files.

View History

git log

• git log -p: Shows diffs per commit.
• git log -3: Shows last 3 commits.
• git log --graph: Shows history as a graph.
• git log --oneline: Shows compact log.

View Changes

git diff

Shows unstaged changes.

git diff --staged

Shows staged changes.

6. File Operations

Stage Specific Files

git add <filename>

Unstage Files

git reset <filename>

Discard Changes

git checkout -- <filename>

Reverts file to last committed state.

Rename File

git mv <old-name> <new-name>

Remove File

git rm <filename>

7. Branch Management

Create and Switch to Branch

git checkout -b <branch-name>

List Branches

git branch

List with details:

git branch -v

Delete Branch

git branch -d <branch-name>

Switch Branch

git checkout <branch-name>

8. Merging

Merge Branch

git merge <branch-name>

Merge Types:

• Fast-forward: No conflicts; branch is ahead of target.
• Three-way: Conflicts possible; creates new merge commit.

9. Remote Operations

List Remotes

git remote

Show Remote Info

git remote -v

git remote show origin

Fetch Changes

git fetch

Get updates without merging.

git fetch --all

Fetch from all remotes.

10. Commit Management

Edit Last Commit Message

git commit --amend

Show Commit Changes

git show <commit-id>

Revert Commit

git revert HEAD

Revert last commit.

git revert <commit-id>

Revert specific commit.

11. Miscellaneous

Change Default Editor

git config --global core.editor "vim"

Clone Repository

git clone <Repo-Link>