Power of IT-Bisa

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### Expanded Summary: Pertemuan 7 - Installasi & Command Dasar GIT

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### 📋 Introduction
This document provides an in-depth introduction to using Git for version control, from installation to mastering key commands. It is tailored for programmers who want to integrate Git into their workflows, with a focus on using Bitbucket as a repository hosting platform. Key areas covered include initializing repositories, managing commits, setting up secure connections with SSH keys, and using .gitignore to optimize repository management.

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### 🛠 Git Installation
Git is a widely used distributed version control system, and its installation is straightforward:

- Download: Access the official Git website ([git-scm.com](https://git-scm.com/downloads)) and download the appropriate installer for your operating system.
- Set Up Bitbucket Account: Create an account at [Bitbucket](https://bitbucket.org), prioritizing the use of professional emails for easier repository transfer in collaborative environments.

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### 🔑 Setting Up SSH Keys for Secure Access
SSH keys enhance security by replacing traditional username-password authentication with cryptographic key pairs:

1. Generate SSH Key:
- Use ssh-keygen with the -t ed25519 -b 4096 flag for strong encryption.
- Include a recognizable email and output filename (bitbucket_work).

2. Start SSH Agent:
- Activate the SSH agent with eval $(ssh-agent).

3. Add Key to SSH Agent:
- Use ssh-add to register the private key, ensuring seamless access during operations like git push.

4. Configure SSH:
- Create or update the .ssh/config file with the following:


     Host bitbucket.org
       AddKeysToAgent yes
       IdentityFile ~/.ssh/bitbucket_work

5. Add Key to Bitbucket:
- Copy the content of the public key file (e.g., bitbucket_work.pub) and add it to your Bitbucket account under SSH settings.

6. Test Connection:
- Confirm successful configuration with ssh -T git@bitbucket.org.

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### 📁 Initializing and Managing Repositories
#### Setting Up a Local Repository
- Use git init to create a repository in a project folder. This command sets up a .git directory to track version history.

#### Configuring Global Variables
- Set global variables to identify the user across all repositories:


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

#### Adding Files
- Use git add to stage files for a commit:
- Add all files: git add .
- Add specific files: git add filename.

#### Committing Changes
- Commit regularly after completing features or fixing bugs. The command:


  git commit -m "Commit message"

allows you to include meaningful descriptions for future reference.

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### 🌐 Connecting and Syncing with Remote Repositories
#### Setting Up a Remote Repository
- Connect the local repository to a remote one using:


  git remote add origin git@bitbucket.org:username/repo_name.git

#### Synchronizing Changes
- Pull updates before pushing to avoid conflicts:


  git pull origin master

- Push changes to the repository:


  git push --set-upstream origin master

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### 🌲 Working with Branches
- Branching Basics: Branches help isolate features or experiments:
- Create a branch: git branch branch_name
- Switch to a branch: git checkout branch_name.

- Main Branch: The master or main branch is typically used for live or production-ready code.

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### 📜 Excluding Files with .gitignore
The .gitignore file prevents unnecessary files from being included in the repository. Common examples include:

- Sensitive files like config.php.
- Large or generated directories like uploads/ or vendor/.

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### 🖥 Cloning Repositories and Viewing Changes
#### Cloning a Repository
- To replicate an existing repository, use:


  git clone https://username@bitbucket.org/username/repo_name.git

#### Viewing Differences
- Inspect changes between your local files and the repository using:


  git diff

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