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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
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    <title>Understanding chmod</title>
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</head>
<body>
    <div class="presentation">
        <div class="slide-counter">
            <span id="current">1</span> / <span id="total">7</span>
        </div>

        <!-- Slide 1: Title -->
        <div class="slide active">
            <h1>📁 Understanding chmod</h1>
            <p style="font-size: 1.5em; margin-top: 40px;">A Simple Guide to File Permissions in Linux/Unix</p>
            <p style="margin-top: 60px; color: #666;">chmod lets you control who can read, write, or execute your files</p>
        </div>

        <!-- Slide 2: What is chmod? -->
        <div class="slide">
            <h2>🤔 What is chmod?</h2>
            <p><span class="highlight">chmod</span> stands for "change mode"</p>
            <p>It's a command that controls file permissions in Linux and Unix systems.</p>
            <div class="visual-example">
                <p style="font-size: 1.3em; margin-bottom: 15px;">Think of it like setting locks on a door:</p>
                <p>🚪 Who can open it? (read)</p>
                <p>✏️ Who can modify it? (write)</p>
                <p>🏃 Who can use it? (execute)</p>
            </div>
        </div>

        <!-- Slide 3: Three Permission Types -->
        <div class="slide">
            <h2>🔐 Three Permission Types</h2>
            <table class="permission-table">
                <tr>
                    <th>Permission</th>
                    <th>Symbol</th>
                    <th>What it means</th>
                </tr>
                <tr>
                    <td><span class="emoji">📖</span>Read</td>
                    <td>r</td>
                    <td>View the file contents</td>
                </tr>
                <tr>
                    <td><span class="emoji">✍️</span>Write</td>
                    <td>w</td>
                    <td>Modify or delete the file</td>
                </tr>
                <tr>
                    <td><span class="emoji">▶️</span>Execute</td>
                    <td>x</td>
                    <td>Run the file as a program</td>
                </tr>
            </table>
        </div>

        <!-- Slide 4: Three User Groups -->
        <div class="slide">
            <h2>👥 Three User Groups</h2>
            <p>Permissions are set for three types of users:</p>
            <ul>
                <li><strong>Owner (u)</strong> - The person who created the file</li>
                <li><strong>Group (g)</strong> - Users in the same group</li>
                <li><strong>Others (o)</strong> - Everyone else</li>
            </ul>
            <div class="visual-example">
                <p style="font-size: 1.2em;">👤 Owner → 👥 Group → 🌍 Others</p>
            </div>
        </div>

        <!-- Slide 5: Numeric Method -->
        <div class="slide">
            <h2>🔢 Numeric Method (Easy Way)</h2>
            <p>Use numbers to set permissions:</p>
            <table class="permission-table">
                <tr>
                    <th>Number</th>
                    <th>Permission</th>
                    <th>Calculation</th>
                </tr>
                <tr>
                    <td>4</td>
                    <td>Read (r)</td>
                    <td>4 + 0 + 0</td>
                </tr>
                <tr>
                    <td>2</td>
                    <td>Write (w)</td>
                    <td>0 + 2 + 0</td>
                </tr>
                <tr>
                    <td>1</td>
                    <td>Execute (x)</td>
                    <td>0 + 0 + 1</td>
                </tr>
                <tr>
                    <td>7</td>
                    <td>All (rwx)</td>
                    <td>4 + 2 + 1</td>
                </tr>
            </table>
        </div>

        <!-- Slide 6: Common Examples -->
        <div class="slide">
            <h2>💡 Common Examples</h2>
            <div class="code-box">
                chmod 755 script.sh
            </div>
            <p>Owner: read, write, execute (7)<br>
               Group: read, execute (5)<br>
               Others: read, execute (5)</p>

            <div class="code-box">
                chmod 644 document.txt
            </div>
            <p>Owner: read, write (6)<br>
               Group: read only (4)<br>
               Others: read only (4)</p>
        </div>

        <!-- Slide 7: Quick Reference -->
        <div class="slide">
            <h2>📋 Quick Reference</h2>
            <div class="code-box">
                chmod 777 file → Everyone can do everything<br>
                chmod 755 file → Owner full, others read/execute<br>
                chmod 700 file → Only owner can access<br>
                chmod 644 file → Owner can edit, others can read
            </div>
            <p style="margin-top: 30px; font-size: 1.1em;">💡 <strong>Tip:</strong> Use 755 for scripts and programs, 644 for regular files!</p>
        </div>

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