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Git Tutorial

Apu Deb Chowdhury
Sylhet, Bangladesh

    <p>I recently completed my undergraduate degree in computer science and engineering at Leading University(LU),Sylhet.</p>

    <h2>Git Uses</h2>
    <p>Git is a tool used for:</p>
    <ul>
        <li>Version control system</li>
        <li>Keeping track of changes</li>
        <li>Collaboration on projects</li>
    </ul>
    <p>Similar tools include:</p>
    <ul>
        <li>GitLab</li>
        <li>Beanstalk</li>
        <li>PerForce</li>
        <li>Bitbucket</li>
    </ul>
    <p>More than 70% of developers use Git.</p>

    <h2>Git & GitHub Difference</h2>
    <ul>
        <li>GitHub is a service; Git is a tool.</li>
        <li>GitHub provides a GUI interface; Git provides a CLI (Command Line Interface).</li>
        <li>GitHub is maintained on the web or cloud; Git is installed and maintained locally.</li>
    </ul>

    <h2>GitHub Version Check</h2>
    <p>Check Git version:</p>
    <pre><code>git --version</code></pre>

    <h2>VS Code GitHub Account Configuration</h2>
    <p>To check your username:</p>
    <pre><code>git config user.name</code></pre>
    <p>To check your email:</p>
    <pre><code>git config user.email</code></pre>
    <p>To configure your username:</p>
    <pre><code>git config --global user.name "imdeb99"</code></pre>
    <p>To configure your email:</p>
    <pre><code>git config --global user.email "apudeb2000@gmail.com"</code></pre>

    <h2>Git Project Push to GitHub</h2>
    <ol>
        <li><strong>Git Initialization:</strong>
            <pre><code>git init</code></pre>
        </li>
        <li><strong>Git Add:</strong>
            <pre><code>git add [file name]   // to add a specific file

git add . // to add all files

Check file status (modified or not):

git status

Restore file status:

git restore [file name]

Check differences:

git diff

Git Commit:

git commit -m "first commit"   // send a message like 'first commit'
-m refers to the message

Check commit history:

git log

Check commit history with summary:

git log --oneline

Get commit ID in log:

git log --oneline

Reset to a previous commit:

git reset --soft [commit id]

Checkout a specific commit:

git checkout [commit id]

Check remote origin:

git remote -v

Create and switch to main branch:

git branch -M main

Push to GitHub:

git push -u origin main

    <h2>Create a New Repository on the Command Line</h2>
    <pre><code>echo "# git-tutorial" >> README.md

git init git add README.md git commit -m "first commit" git branch -M main git remote add origin https://github.com/imdeb99/git-tutorial.git git push -u origin main

    <h2>Push an Existing Repository from the Command Line</h2>
    <pre><code>git remote add origin https://github.com/imdeb99/git-tutorial.git

git branch -M main git push -u origin main